Editor Menus don't update on Mac to currently selected Tab.

Under certain conditions, when switching between the project tab and subsequent docked blueprint tabs, the appropriate menu will not refresh for the currently selected tab.

Regression: No

1. Open Blank Blueprint project in UE4.13.2 without Starter Content
2. NOTE: observer Editor Menu on top line on Mac (See MacMenu1 image attached)
3. Add a blueprint of any class, open Blueprint editor and doc as a tab next to Main Project tab.
4. NOTE: observe that Editor Menu on top line on Mac has changed to include "Assets" in the top line for the selected Blueprint tab (See MacMenu2 image attached)
5. Select main Project tab and select the option "File" twice, without selecting anything from the resulting dropdown menu
6. Now select the Blueprint tab (to make active)
   RESULT: The top line Editor Menu does not refresh but instead remains without the "Asset" option as shown for when the Main Project tab is selected in Macmenu1 image.
   EXPECTED: Regardless of what is selected in the top menu, the top menu to refresh and correspond with the appropriate live selected tab

NOTE: You can do this the other direction as well by selecting "File" twice with the Blueprint menu live and then selecting the Main Project tab. The top menu bar will reflect options available that are typically reserved for when the Blueprint tab is selected and active.

na