* rename some variables (eg. fMenu1 -> fInputMenu)
* rearrange some code for improved clarity
* fix an instance of casting BMenuItem*s to dormant_node_info*s before deleting them (now we just delete them as BMenuItems)
* use a BGridView to align the MenuFields in Audio/Video setting views.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39190 a95241bf-73f2-0310-859d-f6bbb57e9c96