Add shortcut for Pan Mode (G)

And change TileMap Bucket Fill shortcut to (B).

Fixes #8582.

editor/plugins/canvas_item_editor_plugin.cpp

@@ -5610,6 +5610,7 @@ CanvasItemEditor::CanvasItemEditor(EditorNode *p_editor) {
 	hb->add_child(pan_button);
 	pan_button->set_toggle_mode(true);
 	pan_button->connect("pressed", callable_mp(this, &CanvasItemEditor::_button_tool_select), make_binds(TOOL_PAN));
+	pan_button->set_shortcut(ED_SHORTCUT("canvas_item_editor/pan_mode", TTR("Pan Mode"), KEY_G));
 	pan_button->set_tooltip(TTR("Pan Mode"));
 
 	ruler_button = memnew(ToolButton);

editor/plugins/tile_map_editor_plugin.cpp

@@ -1951,7 +1951,7 @@ TileMapEditor::TileMapEditor(EditorNode *p_editor) {
 	toolbar->add_child(paint_button);
 
 	bucket_fill_button = memnew(ToolButton);
-	bucket_fill_button->set_shortcut(ED_SHORTCUT("tile_map_editor/bucket_fill", TTR("Bucket Fill"), KEY_G));
+	bucket_fill_button->set_shortcut(ED_SHORTCUT("tile_map_editor/bucket_fill", TTR("Bucket Fill"), KEY_B));
 	bucket_fill_button->connect("pressed", callable_mp(this, &TileMapEditor::_button_tool_select), make_binds(TOOL_BUCKET));
 	bucket_fill_button->set_toggle_mode(true);
 	toolbar->add_child(bucket_fill_button);