Many modules call "refreshModuleMenu" when starting.
In fact the "renderMenu" behaves different than before the
transition to ExtJS 4 so that the backend got reloaded
completely.
Change it, to just refresh the menu as requested.

Change-Id: Ibe5c3693a4a9a5184d3c5d2f33ce86ee6a574669
Fixes: #32664
Releases: 4.7
Reviewed-on: http://review.typo3.org/7365
Reviewed-by: Oliver Hader
Tested-by: Oliver Hader
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
Reviewed-by: Steffen Ritter
Tested-by: Steffen Ritter