Refine text asset autosave test scripts

Make sure saved data is preserved across page refreshes.

Remove title when referencing the first section in the section list
to make test less brittle.

Addresses #848
Fix project and organization search in admin

The search field needed to refrence the fact that it's on the
translation relation, not the Organization/Project model itself.
jslint fixes

* Remove unnecessary semicolon
* Use dot-notation instead of array notation
Squash repeated auto-saves

When editing the HTML of a text asset, the ``change:body`` event
will be firing much more frequently. Only save when things have
stopped changing.

Addresses #848