Merge branch 'new-branch-position-fix' into 'master'

fixes new branch button positioning, when visible and not visible container

Fixes #5893
#5893 was not completely fixed. If a new branch was pushed the container is in correct position but if no container existed the position was incorrect. This MR fixes that. 

See merge request !2348

app/assets/stylesheets/pages/projects.scss

@@ -411,11 +411,15 @@ ul.nav.nav-projects-tabs {
   }
 }
 
+.last-push-widget {
+  margin-top: -1px;
+}
+
 .top-area {
   border-bottom: 1px solid #EEE;
   margin: 0 -16px;
   padding: 0 $gl-padding;
-  height: 57px;
+  height: 42px;
 
   ul.left-top-menu {
     display: inline-block;
@@ -522,6 +526,7 @@ pre.light-well {
 .projects-search-form {
   margin: -$gl-padding;
   padding: $gl-padding;
+  padding-bottom: 0;
   margin-bottom: 0px;
 
   input {

app/views/events/_event_last_push.html.haml

 - if show_last_push_widget?(event)
-  .gray-content-block.clear-block
+  .gray-content-block.clear-block.last-push-widget
     .event-last-push
       .event-last-push-text
         %span You pushed to