Give a bigger target area to AppsDrawer vertical resizer

The existing target was too hard to hit, which annoyed users. This change makes it the same sort of surface area as the horizontal resizers, as requested by design to fix the problem in the short term.

src/components/views/rooms/AppsDrawer.js

@@ -252,6 +252,7 @@ export default class AppsDrawer extends React.Component {
                     minHeight={100}
                     maxHeight={this.props.maxHeight ? this.props.maxHeight - 50 : undefined}
                     handleClass="mx_AppsContainer_resizerHandle"
+                    handleWrapperClass="mx_AppsContainer_resizerHandleContainer"
                     className="mx_AppsContainer_resizer"
                     resizeNotifier={this.props.resizeNotifier}
                 >