bitbake: toaster: fix builds page CSS and functionality

bitbake: toaster: fix builds page CSS and functionality

This patch fixes a set of CSS and functionality problems
with the build list page:

* Fix Recent Builds text styles
* Added proper links from Failed Tasks entries.
* Always Search returns to the first page of results.
* Clear search button appears only if search is active.
* Search shows the number of object, proper no objects found
* Various smaller fixes.

(Bitbake rev: 9164948e387a726f318f723f63e8d93435d7afe6)

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>