Merge branch 'star-fork-mobile' into 'master'

Display Star and Fork on mobile, fix #18537.

## What does this MR do?

Displays the Star and Fork buttons on mobile devices.

## Are there points in the code the reviewer needs to double check?

Nope.

## Why was this MR needed?

I wanted to star and/or fork projects while on my phone, I couldn't do that before.

## What are the relevant issue numbers?

#18537 

## Screenshots (if relevant)

![Screen_Shot_2016-06-16_at_11.41.24_AM](/uploads/053ac0c1b39a7b1b30fffb0a8d43cffb/Screen_Shot_2016-06-16_at_11.41.24_AM.png)

cc: @jschatz1 

See merge request !4714

CHANGELOG

@@ -7,6 +7,7 @@ v 8.9.0 (unreleased)
   - Add more information into RSS feed for issues (Alexander Matyushentsev)
   - Bulk assign/unassign labels to issues.
   - Ability to prioritize labels !4009 / !3205 (Thijs Wouters)
+  - Show Star and Fork buttons on mobile.
   - Fix endless redirections when accessing user OAuth applications when they are disabled
   - Allow enabling wiki page events from Webhook management UI
   - Bump rouge to 1.11.0

app/assets/stylesheets/framework/mobile.scss

@@ -52,6 +52,19 @@
     .git-clone-holder {
       display: none;
     }
+
+    // Display Star and Fork buttons without counters on mobile.
+    .project-action-buttons {
+      display: block;
+
+      .count-buttons .btn {
+        margin: 0 10px;
+      }
+
+      .count-buttons .count-with-arrow {
+        display: none;
+      }
+    }
   }
 
   .project-stats {

app/views/projects/_home_panel.html.haml

@@ -21,7 +21,7 @@
             = link_to project_path(forked_from_project) do
               = forked_from_project.namespace.try(:name)
 
-        .project-repo-buttons
+        .project-repo-buttons.project-action-buttons
           .count-buttons
             = render 'projects/buttons/star'
             = render 'projects/buttons/fork'