New layout:

1. PreferencesDialog: When "Cancel" is selected, don't close the PreferencesDialog, just revert layout mode selection
2. For the tooltip of "Switch to Settings" added information about shortcuts
3. Shortcuts for the switching between tabs work from Settings Dialog now
4. Fixed the collapse button show after preference's change

src/slic3r/GUI/GLCanvas3D.hpp

@@ -724,6 +724,7 @@ public:
     int get_main_toolbar_item_id(const std::string& name) const { return m_main_toolbar.get_item_id(name); }
     void force_main_toolbar_left_action(int item_id) { m_main_toolbar.force_left_action(item_id, *this); }
     void force_main_toolbar_right_action(int item_id) { m_main_toolbar.force_right_action(item_id, *this); }
+    void update_tooltip_for_settings_item_in_main_toolbar();
 
     bool has_toolpaths_to_export() const;
     void export_toolpaths_to_obj(const char* filename) const;