Bootstrapify the Hydra forms (except the project and jobset edit pages)

Plus lots of other tweaks.

src/root/jobset-eval.tt

@@ -1,7 +1,7 @@
 [% WRAPPER layout.tt title="Jobset $project.name:$jobset.name evaluation $eval.id" %]
 [% PROCESS common.tt %]
 
-<h2>Jobset <tt>[% project.name %]:[% jobset.name %]</tt> evaluation [% eval.id %]</h2>
+<div class="page-header"><h1>Jobset <tt>[% project.name %]:[% jobset.name %]</tt> evaluation [% eval.id %]</h1></div>
 
 [%- IF otherEval -%]
 <p>Comparisons are relative to [% INCLUDE renderFullJobsetName