iOS: Fix a context menu related crash by removing autorelease from DWMenuItem. Something is stil not quite right here, the popup menu lingering from a long touch on another DWRender and causing the popup to show on a DWRender that doesn't respond to the popup. However the crash was critical and the current misbehavior is not. Also check the pointer passed to dw_menu_popup().

[Desktop Entry]
Name=Dynamic Windows Test
Exec=@prefix@/bin/dwtest 
Terminal=false
MultipleArgs=false
Type=Application
Categories=Application;Development;X-Red-Hat-Base;