If a menu has an entry that is a submenu, and that submenu has entries in it that are also submenus, then the entire menu will close when left clicking the submenu button instead of hovering it.

Some other examples from users:
1. "Add/Import Content" when right clicking a folder in the Content Browser.
2. "Manage Collections" when right clicking an asset (a Material or Blueprint, for example) in the Content Browser.

Steps to Reproduce
  1. Create or Open a project with Preview 2
  2. In the Main Menu Bar left click Build
  3. Left Click Lighting Info
  4. Hover the mouse around the options in the submenu of Lighting Info

Expected Results:
Menu remains open and users are able to access submenus

Actual Results:
Menu closes

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ComponentUE - Editor - UI Systems
Affects Versions5.0
Target Fix5.1
Fix Commit22204812
Main Commit22206232
Release Commit22204812
CreatedMar 25, 2022
ResolvedSep 27, 2022
UpdatedOct 21, 2022
Pull Requests
9423 - grafikrobot