Make several actions in the Inspector dock more obvious

editor/inspector_dock.h

@@ -81,9 +81,11 @@ class InspectorDock : public VBoxContainer {
 	Button *resource_new_button;
 	Button *resource_load_button;
 	MenuButton *resource_save_button;
+	MenuButton *resource_extra_button;
 	MenuButton *history_menu;
 	LineEdit *search;
 
+	Button *open_docs_button;
 	MenuButton *object_menu;
 	EditorPath *editor_path;