[Toaster] [review-request] bbarrosp/front-end

[Barros Pena, Belen]

bbarrosp/front-end branch:

* Replaces "0 builds found" with "No builds found" to match the builds
table to all other tables in Toaster
* Removes some trailing spaces that where showing up it filter headings
* Makes some small changes to the packages included UI and the table
search form
* Gets the blue highlight animation working properly in the directory
structure page

Thanks!

Belén