css: Use @brand-success for input text focus
css: Remove unneeded hack
advanced.html: Use .btn-success for search btn
search.html: Set the form action
tools/sloccount: Fix path to Twig lib
tools/sloccount: Remove CSS from sloccounts
_page.html: Rename _footer.hide to _footer.hidden
_page.html: Add a _navbar.hidden property
login.{php,html}: Use a template

Issue #94.
css: Help with invisible navbar colors