-error: see title, you have to scroll up to populate the menu
--works well on windows
--works well when the menu can pop downwards from the editor window

-repro:
--create new project
--maximize editor window
--select folder in Project browser
--in the inspector at the bottom click the AssetBundle dropdown menu
--NOTICE that the menu is empty (see assetbundlebottommenu.png below)

--you can click the arrow the have it scroll down
--if the editor window is placed for the menu to expand down it also works