Improve css code quality for projects.scss

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

app/assets/stylesheets/pages/projects.scss

@@ -50,7 +50,17 @@
   }
 
   .project-home-dropdown {
-    margin: 11px 3px 0;
+    margin: 13px 0px 0;
+  }
+
+  .notifications-btn {
+    .fa-bell {
+      margin-right: 6px;
+    }
+
+    .fa-angle-down {
+      margin-left: 6px;
+    }
   }
 
   .project-home-desc {
@@ -85,6 +95,7 @@
       color: inherit;
     }
   }
+
   .input-group {
     display: inline-table;
     position: relative;
@@ -233,23 +244,11 @@
     }
   }
 
-  .fa-fw {
+  i {
     margin-right: 8px;
   }
 }
 
-.fa-bell {
-  margin-right: 6px;
-}
-
-.fa-angle-down {
-  margin-left: 6px;
-}
-
-.project-home-panel .project-home-dropdown {
-  margin: 13px 0px 0;
-}
-
 .project-visibility-level-holder {
   .radio {
     margin-bottom: 10px;
@@ -548,7 +547,7 @@ pre.light-well {
   margin-right: -$gl-padding;
   padding: $gl-padding;
   border-top: 0;
-  
+
   .edit-project-readme {
     z-index: 100;
     position: relative;

app/views/projects/buttons/_notifications.html.haml

@@ -5,7 +5,7 @@
     = hidden_field_tag :notification_id, @membership.id
     = hidden_field_tag :notification_level
     %span.dropdown
-      %a.dropdown-new.btn.btn-new#notifications-button{href: '#', "data-toggle" => "dropdown"}
+      %a.dropdown-new.btn.notifications-btn#notifications-button{href: '#', "data-toggle" => "dropdown"}
         = icon('bell')
         = notification_label(@membership)
         = icon('angle-down')
@@ -14,7 +14,7 @@
           = notification_list_item(level, @membership)
 
 - when GroupMember
-  .btn.btn-new.disabled.has_tooltip{title: "To change the notification level, you need to be a member of the project itself, not only its group."}
+  .btn.disabled.notifications-btn.has_tooltip{title: "To change the notification level, you need to be a member of the project itself, not only its group."}
     = icon('bell')
     = notification_label(@membership)
     = icon('angle-down')