Options from the "Preferences" dialog added to the Search

Some code refactoring:
* use GUI_App::open_preferences() on all places where it's needed
* Preferences Dialog is an attribute of a ManeFrame class and created just ones during the MainFrame creation now.
* Created class Highlighter. Use it in Preferences and Tab

src/slic3r/GUI/GLCanvas3D.cpp

@@ -4010,8 +4010,11 @@ bool GLCanvas3D::_render_search_list(float pos_x)
             action_taken = true;
         else
             sidebar.jump_to_option(selected);*/
-        if (selected != 9999)
+        if (selected != 9999) {
+            imgui->end(); // end imgui before the jump to option
             sidebar.jump_to_option(selected);
+            return true;
+        }
         action_taken = true;
     }