fix sideways overflow on preview sidebar
have builder ondrop trigger preview refresh
remove dragging classes ondrop
three app max for collection tiles (bug 1035425)
Merge pull request #15 from spasovski/threeapps

three app max for collection tiles (bug 1035425)
fix shelf on builder remove
remove carrierless as a carrier option
fix margin on brands (bug 1039828)
no render shelves on builder, fix brand title on feed builder
disable the submit button on builder while feeds are loading
change wording to make it clear of batch feed updates
Update design of navigation
Featured apps field improvements
Update design of navigation

Conflicts:
	src/media/css/lib.styl
	src/media/css/transsonic.styl
Consistency improvements to collection creation page.
Consistency improvements to editorial brand creation page.
Consistency improvements to operator shelf creation page.
Change placeholder color for textareas
Correctly position preview in grid
Don't cache selectors in app_selector.