Merge branch 'mf-modal-style-footer-button-spacing' into 'master'

Reduce margin between modal footer buttons

See merge request gitlab-org/gitlab-ce!30428

app/assets/stylesheets/framework/modal.scss

@@ -53,6 +53,10 @@
   display: flex;
   flex-direction: row;
 
+  .btn {
+    margin: 0;
+  }
+
   .btn + .btn:not(.dropdown-toggle-split),
   .btn + .btn-group,
   .btn-group + .btn {