replaced self-hacked™ solution with bulma panels for changesets

scm-ui/src/repos/containers/ChangesetsRoot.js

@@ -89,10 +89,12 @@ class BranchRoot extends React.Component<Props> {
     const changesets = <Changesets repository={repository} branch={branch} />;
 
     return (
-      <div className="has-border-around is-round">
+      <nav className="panel">
+        <article className="panel-heading">
         {this.renderBranchSelector()}
+        </article>
         <Route path={`${url}/:page?`} component={() => changesets} />
-      </div>
+      </nav>
     );
   }