bitbake: toaster: Small tweaks to the no results page

bitbake: toaster: Small tweaks to the no results page

Correctly align the Search button to the text input field,
add .btn class to the clear search button, replace the
placeholder attribute with the value attribute so that you
can edit your search query, remove the clear search button
from the tab index so that you don't clear the search by
mistake and edit the margins of the .no-results class.

(Bitbake rev: 4ada4307623c1e27b589831d359dc6351e6e3ad5)

Signed-off-by: Belen Barros Pena <belen.barros.pena@intel.com>
Conflicts:
	bitbake/lib/toaster/toastergui/templates/build.html
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>