ios7 ui patch2

Second set of ui patches for IOS7

Fixes picker UI on IOS7
Fixes tableView selector issue
Fixes most of tableView autosizing issue
Popover bug fix

Known issues:
UI does not update correctly on hiding status bar (still investigating)
tableView search is still unresponsive

Test using KS [PR 109](https://github.com/appcelerator-developer-relations/KitchenSink/pull/109)