Makes more editor strings translatable

* Title of Sprite Editor convert preview dialogs
* Title of UV Channel Debug dialog
* Various editor warnings
* GridMap popup menu item "Paste Selects"
* Tileset editor shape button texts
* MeshLibrary update confirmation text

editor/animation_track_editor.cpp

@@ -4579,7 +4579,7 @@ void AnimationTrackEditor::_new_track_property_selected(String p_name) {
 			bool valid;
 			subindices = _get_bezier_subindices_for_type(h.type, &valid);
 			if (!valid) {
-				EditorNode::get_singleton()->show_warning("Invalid track for Bezier (no suitable sub-properties)");
+				EditorNode::get_singleton()->show_warning(TTR("Invalid track for Bezier (no suitable sub-properties)"));
 				return;
 			}
 		}

editor/export_template_manager.cpp

@@ -351,7 +351,7 @@ void ExportTemplateManager::ok_pressed() {
 void ExportTemplateManager::_http_download_mirror_completed(int p_status, int p_code, const PoolStringArray &headers, const PoolByteArray &p_data) {
 
 	if (p_status != HTTPRequest::RESULT_SUCCESS || p_code != 200) {
-		EditorNode::get_singleton()->show_warning("Error getting the list of mirrors.");
+		EditorNode::get_singleton()->show_warning(TTR("Error getting the list of mirrors."));
 		return;
 	}
 
@@ -369,7 +369,7 @@ void ExportTemplateManager::_http_download_mirror_completed(int p_status, int p_
 	int errline;
 	Error err = JSON::parse(mirror_str, r, errs, errline);
 	if (err != OK) {
-		EditorNode::get_singleton()->show_warning("Error parsing JSON of mirror list. Please report this issue!");
+		EditorNode::get_singleton()->show_warning(TTR("Error parsing JSON of mirror list. Please report this issue!"));
 		return;
 	}
 

editor/plugins/animation_state_machine_editor.cpp

@@ -262,7 +262,7 @@ void AnimationNodeStateMachineEditor::_state_machine_gui_input(const Ref<InputEv
 		if (connecting_to_node != StringName()) {
 
 			if (state_machine->has_transition(connecting_from, connecting_to_node)) {
-				EditorNode::get_singleton()->show_warning("Transition exists!");
+				EditorNode::get_singleton()->show_warning(TTR("Transition exists!"));
 
 			} else {
 

editor/plugins/mesh_instance_editor_plugin.cpp

@@ -456,7 +456,7 @@ MeshInstanceEditor::MeshInstanceEditor() {
 	add_child(err_dialog);
 
 	debug_uv_dialog = memnew(AcceptDialog);
-	debug_uv_dialog->set_title("UV Channel Debug");
+	debug_uv_dialog->set_title(TTR("UV Channel Debug"));
 	add_child(debug_uv_dialog);
 	debug_uv = memnew(Control);
 	debug_uv->set_custom_minimum_size(Size2(600, 600) * EDSCALE);

editor/plugins/mesh_library_editor_plugin.cpp

@@ -241,7 +241,7 @@ void MeshLibraryEditor::_menu_cbk(int p_option) {
 		} break;
 		case MENU_OPTION_UPDATE_FROM_SCENE: {
 
-			cd->set_text("Update from existing scene?:\n" + String(mesh_library->get_meta("_editor_source_scene")));
+			cd->set_text(vformat(TTR("Update from existing scene?:\n%s"), String(mesh_library->get_meta("_editor_source_scene"))));
 			cd->popup_centered(Size2(500, 60));
 		} break;
 	}

editor/plugins/script_text_editor.cpp

@@ -1559,7 +1559,7 @@ void ScriptTextEditor::drop_data_fw(const Point2 &p_point, const Variant &p_data
 		Node *sn = _find_script_node(get_tree()->get_edited_scene_root(), get_tree()->get_edited_scene_root(), script);
 
 		if (!sn) {
-			EditorNode::get_singleton()->show_warning("Can't drop nodes because script '" + get_name() + "' is not used in this scene.");
+			EditorNode::get_singleton()->show_warning(vformat(TTR("Can't drop nodes because script '%s' is not used in this scene."), get_name()));
 			return;
 		}
 

editor/plugins/sprite_editor_plugin.cpp

@@ -125,7 +125,7 @@ void SpriteEditor::_menu_option(int p_option) {
 		case MENU_OPTION_CONVERT_TO_MESH_2D: {
 
 			debug_uv_dialog->get_ok()->set_text(TTR("Create Mesh2D"));
-			debug_uv_dialog->set_title("Mesh2D Preview");
+			debug_uv_dialog->set_title(TTR("Mesh2D Preview"));
 
 			_update_mesh_data();
 			debug_uv_dialog->popup_centered();
@@ -135,7 +135,7 @@ void SpriteEditor::_menu_option(int p_option) {
 		case MENU_OPTION_CONVERT_TO_POLYGON_2D: {
 
 			debug_uv_dialog->get_ok()->set_text(TTR("Create Polygon2D"));
-			debug_uv_dialog->set_title("Polygon2D Preview");
+			debug_uv_dialog->set_title(TTR("Polygon2D Preview"));
 
 			_update_mesh_data();
 			debug_uv_dialog->popup_centered();
@@ -144,7 +144,7 @@ void SpriteEditor::_menu_option(int p_option) {
 		case MENU_OPTION_CREATE_COLLISION_POLY_2D: {
 
 			debug_uv_dialog->get_ok()->set_text(TTR("Create CollisionPolygon2D"));
-			debug_uv_dialog->set_title("CollisionPolygon2D Preview");
+			debug_uv_dialog->set_title(TTR("CollisionPolygon2D Preview"));
 
 			_update_mesh_data();
 			debug_uv_dialog->popup_centered();
@@ -154,7 +154,7 @@ void SpriteEditor::_menu_option(int p_option) {
 		case MENU_OPTION_CREATE_LIGHT_OCCLUDER_2D: {
 
 			debug_uv_dialog->get_ok()->set_text(TTR("Create LightOccluder2D"));
-			debug_uv_dialog->set_title("LightOccluder2D Preview");
+			debug_uv_dialog->set_title(TTR("LightOccluder2D Preview"));
 
 			_update_mesh_data();
 			debug_uv_dialog->popup_centered();

editor/plugins/sprite_frames_editor_plugin.cpp

@@ -202,7 +202,7 @@ void SpriteFramesEditor::_prepare_sprite_sheet(const String &p_file) {
 
 	Ref<Resource> texture = ResourceLoader::load(p_file);
 	if (!texture.is_valid()) {
-		EditorNode::get_singleton()->show_warning("Unable to load images");
+		EditorNode::get_singleton()->show_warning(TTR("Unable to load images"));
 		ERR_FAIL_COND(!texture.is_valid());
 	}
 	if (texture != split_sheet_preview->get_texture()) {

editor/plugins/tile_set_editor_plugin.cpp

@@ -2036,10 +2036,10 @@ void TileSetEditor::_update_toggle_shape_button() {
 		tools[SHAPE_TOGGLE_TYPE]->hide();
 	} else if (concave.is_valid()) {
 		tools[SHAPE_TOGGLE_TYPE]->set_icon(get_icon("ConvexPolygonShape2D", "EditorIcons"));
-		tools[SHAPE_TOGGLE_TYPE]->set_text("Make Convex");
+		tools[SHAPE_TOGGLE_TYPE]->set_text(TTR("Make Convex"));
 	} else if (convex.is_valid()) {
 		tools[SHAPE_TOGGLE_TYPE]->set_icon(get_icon("ConcavePolygonShape2D", "EditorIcons"));
-		tools[SHAPE_TOGGLE_TYPE]->set_text("Make Concave");
+		tools[SHAPE_TOGGLE_TYPE]->set_text(TTR("Make Concave"));
 	} else {
 		// Shouldn't happen
 		separator_shape_toggle->hide();

modules/gridmap/grid_map_editor_plugin.cpp

@@ -1256,7 +1256,7 @@ GridMapEditor::GridMapEditor(EditorNode *p_editor) {
 	options->get_popup()->add_item(TTR("Cursor Back Rotate Z"), MENU_OPTION_CURSOR_BACK_ROTATE_Z, KEY_MASK_SHIFT + KEY_D);
 	options->get_popup()->add_item(TTR("Cursor Clear Rotation"), MENU_OPTION_CURSOR_CLEAR_ROTATION, KEY_W);
 	options->get_popup()->add_separator();
-	options->get_popup()->add_check_item("Paste Selects", MENU_OPTION_PASTE_SELECTS);
+	options->get_popup()->add_check_item(TTR("Paste Selects"), MENU_OPTION_PASTE_SELECTS);
 	options->get_popup()->add_separator();
 	options->get_popup()->add_item(TTR("Duplicate Selection"), MENU_OPTION_SELECTION_DUPLICATE, KEY_MASK_CTRL + KEY_C);
 	options->get_popup()->add_item(TTR("Cut Selection"), MENU_OPTION_SELECTION_CUT, KEY_MASK_CTRL + KEY_X);