added shortcuts/hotkeys for tileset editor plugin collision buttons, with suggested changes.

(cherry picked from commit cf582262c2a877664c7b123867bc60dd5e2de616)

editor/plugins/tile_set_editor_plugin.cpp

@@ -517,6 +517,7 @@ TileSetEditor::TileSetEditor(EditorNode *p_editor) {
 	tools[SHAPE_NEW_RECTANGLE]->set_button_group(tg);
 	tools[SHAPE_NEW_RECTANGLE]->set_tooltip(TTR("Create a new rectangle."));
 	tools[SHAPE_NEW_RECTANGLE]->connect("pressed", this, "_on_tool_clicked", varray(SHAPE_NEW_RECTANGLE));
+	tools[SHAPE_NEW_RECTANGLE]->set_shortcut(ED_SHORTCUT("tileset_editor/shape_new_rectangle", TTR("New Rectangle"), KEY_MASK_SHIFT | KEY_R));
 
 	tools[SHAPE_NEW_POLYGON] = memnew(ToolButton);
 	toolbar->add_child(tools[SHAPE_NEW_POLYGON]);
@@ -524,6 +525,7 @@ TileSetEditor::TileSetEditor(EditorNode *p_editor) {
 	tools[SHAPE_NEW_POLYGON]->set_button_group(tg);
 	tools[SHAPE_NEW_POLYGON]->set_tooltip(TTR("Create a new polygon."));
 	tools[SHAPE_NEW_POLYGON]->connect("pressed", this, "_on_tool_clicked", varray(SHAPE_NEW_POLYGON));
+	tools[SHAPE_NEW_POLYGON]->set_shortcut(ED_SHORTCUT("tileset_editor/shape_new_polygon", TTR("New Polygon"), KEY_MASK_SHIFT | KEY_P));
 
 	separator_shape_toggle = memnew(VSeparator);
 	toolbar->add_child(separator_shape_toggle);
@@ -535,6 +537,7 @@ TileSetEditor::TileSetEditor(EditorNode *p_editor) {
 	toolbar->add_child(separator_delete);
 	tools[SHAPE_DELETE] = memnew(ToolButton);
 	tools[SHAPE_DELETE]->connect("pressed", this, "_on_tool_clicked", varray(SHAPE_DELETE));
+	tools[SHAPE_DELETE]->set_shortcut(ED_SHORTCUT("tileset_editor/shape_delete", TTR("Delete Selected Shape"), KEY_MASK_SHIFT | KEY_BACKSPACE));
 	toolbar->add_child(tools[SHAPE_DELETE]);
 
 	spin_priority = memnew(SpinBox);