Consistently cancel navigation from posts view.
Present all compose views as page sheet.
Work around PM compose view first responder weirdness when presenting from a profile view.
Fix missing symbol on iOS 5.
Fix icon action sheet labels on iOS 5.
Icon action sheet tweaks.

Fix title wrapping, and give the title the same margins as the icon grid.

Can present the icon action sheet from a rect in a view.

Tweak the item width to fit longer captions (i.e. "Mark Read Up to Here").