Fix review panel toolbar in flex contexts.

services/web/public/stylesheets/app/editor/review-panel.less

@@ -112,6 +112,8 @@
 	background-color: @rp-bg-dim-blue;
 	text-align: center;
 	z-index: 2;
+	flex-basis: 32px;
+	flex-shrink: 0;
 }
 	.review-panel-toolbar-label {
 		cursor: pointer;