Use label-branch css for MR branches info

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/projects/merge_requests/_new_submit.html.haml

@@ -2,11 +2,9 @@
   New merge request
 %p.slead
   From
-  %strong.monospace
-    #{@merge_request.source_project_namespace}:#{@merge_request.source_branch}
-  into
-  %strong.monospace
-    #{@merge_request.target_project_namespace}:#{@merge_request.target_branch}
+  %strong.label-branch #{@merge_request.source_project_namespace}:#{@merge_request.source_branch}
+  %span into
+  %strong.label-branch #{@merge_request.target_project_namespace}:#{@merge_request.target_branch}
 
   %span.pull-right
     = link_to 'Change branches', new_project_merge_request_path(@project)

app/views/projects/merge_requests/show/_mr_title.html.haml

@@ -28,15 +28,11 @@
   = link_to project_merge_requests_path(@project) do
     ← To merge requests
 
-  %span.prepend-left-20.monospace
-    -if @merge_request.for_fork?
-      %span
-        %strong
-          #{truncate(@merge_request.source_project_path, length: 25)}:
-        #{@merge_request.source_branch}
-      →
-      %span= @merge_request.target_branch
+  %span.prepend-left-20
+    %span From
+    - if @merge_request.for_fork?
+      %strong.label-branch #{@merge_request.source_project_namespace}:#{@merge_request.source_branch}
     - else
-      %span= @merge_request.source_branch
-      →
-      %span= @merge_request.target_branch
+      %strong.label-branch #{@merge_request.source_branch}
+    %span into
+    %strong.label-branch #{@merge_request.target_branch}