modified dialogue choices.
add padding to buttons.
* resize fonts
* only display search results checkbox for choice states.
placeholder for tooltip.
decrease amount of columns to 3.
tweaks to fix firefox layout.
close button could be pushed off.
cleaning up css a bit.
Merge branch 'develop-frontend' into feature/issue-524-stored-value-name-and-searchable

Conflicts:
	go/base/static/templates/campaign/dialogue/states/choice/edit.jst
Fix broken choice edit template that broke when merging in #546
Merge branch 'feature/issue-524-stored-value-name-and-searchable' of github.com:praekelt/vumi-go into feature/issue-524-stored-value-name-and-searchable
Fix broken test made after changing the dialogue screen's states-per-row count from 4 to 3
Merge branch 'develop-frontend' into feature/issue-524-stored-value-name-and-searchable
Fix class name conflict (generic labels and choice labels)
Basic PopoverView
remove padding and width
Merge branch 'feature/issue-524-stored-value-name-and-searchable' of github.com:praekelt/vumi-go into feature/issue-524-stored-value-name-and-searchable
Slugify util
Change PopoverView to emit 'show' and 'hide' events
View for editing extras of a choice in a dialogue state