Animate show/hide searchbar.

closes #108
Correctly detect the state of the omnibox in the searchbar keybindings.
Store searchbar text on exit.
Better searchbar rendering.

Use the template, don't assume searchText ready on initialize.
Keep model code in the model.

Remove shared "data" logic from the omnibox view and put it in the
omnibox model.
Unpixilate cancel button.