Remove boostrap.js

    As long as storyboard is using UI Bootstrap
http://angular-ui.github.io/bootstrap/ we do not need bootstrap.js
all the needed components are already present in the angular library.

    The patch mainly consists in fixing the use of dropdown, as long
as the dropdown directive already use a stopPropagation and a
preventDefault we do not need to call it ourselves even in a custom
directive.

Change-Id: I72cceaaaf8371583e10f955862699d4fd41e7ba5
Merge "Remove boostrap.js"