Set size of RT when review panel is expanded

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

@@ -775,6 +775,12 @@
 	}
 }
 
+#editor-rich-text {
+	.rp-size-expanded & {
+		right: @review-panel-width;
+	}
+}
+
 .rp-toggle {
 	display: inline-block;
 	vertical-align: middle;