style network graph form a bit

app/assets/stylesheets/gitlab_bootstrap/common.scss

@@ -20,6 +20,7 @@
 .hint { font-style: italic; color: #999; }
 .light { color: #888 }
 .tiny { font-weight: normal }
+.vtop { vertical-align: top; }
 
 
 /** ALERT MESSAGES **/

app/views/graph/_head.html.haml

-%ul.nav.nav-tabs
-  %li
+%h3.page_title Project Network Graph
+%hr
+
+.clearfix
+  .pull-left
     = render partial: 'shared/ref_switcher', locals: {destination: 'graph', path: @path}
-  %li.pull-right.search
-    = form_tag project_graph_path(@project, params[:id]), method: :get, class: 'navbar-form' do |f|
-      = label_tag :search , "Looking for commit:"
-      = text_field_tag :q, @q, placeholder: "Input SHA", class: "search-input"
 
-%h3.page_title Project Network Graph
+  .search.pull-right
+    = form_tag project_graph_path(@project, params[:id]), method: :get do |f|
+      .control-group
+        = label_tag :search , "Looking for commit:", class: 'control-label light'
+        .controls
+          = text_field_tag :q, @q, placeholder: "Input SHA", class: "search-input xlarge"
+          = button_tag type: 'submit', class: 'btn vtop' do
+            %i.icon-search
+