Add right margin to toolbar if review panel open

This fixes bug where the toolbar would be measured incorrectly if the
review panel was open

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

@@ -793,6 +793,12 @@
 	}
 }
 
+.toolbar-editor {
+	.rp-size-expanded & {
+		margin-right: @review-panel-width;
+	}
+}
+
 .rp-toggle {
 	display: inline-block;
 	vertical-align: middle;