clean code

src/client/js/components/PageEditor/DrawioModal.jsx

@@ -139,7 +139,7 @@ export default class DrawioModal extends React.PureComponent {
               <iframe
                 ref={(c) => { this.drawioIFrame = c }}
                 src={this.drawioURL()}
-                className="border-0"
+                className="border-0 flex-grow-1"
               >
               </iframe>
             ) }

src/client/styles/scss/_drawio.scss

@@ -1,8 +1,3 @@
 .drawio-modal {
   @include expand-modal-fullscreen(false, false);
-
-  // expand iframe with flexbox
-  iframe {
-    flex: 1;
-  }
 }