Merge branch '2802-environments-deploy-boards' into 'master'

Fix alignment of deploy board toggle; hide deploy boards on mobile

Closes #2802

See merge request !2646

app/assets/stylesheets/pages/environments.scss

@@ -255,10 +255,19 @@
   }
 }
-.deploy-board-icon i {
-  cursor: pointer;
-  color: $layout-link-gray;
-  padding-right: 10px;
+.deploy-board-icon {
+  display: none;
+
+  @media (min-width: $screen-md-min) {
+    float: left;
+    display: block;
+  }
+
+  i {
+    cursor: pointer;
+    color: $layout-link-gray;
+    padding-right: 10px;
+  }
 }
 .deploy-board {