Fix webcams area auto adjust when minimize presentation

bigbluebutton-html5/imports/ui/components/layout/layout-manager.jsx

@@ -87,6 +87,10 @@ class LayoutManager extends Component {
     window.addEventListener('slideChanged', () => {
       setTimeout(() => this.setLayoutSizes(), 200);
     });
+
+    window.addEventListener('togglePresentationHide', () => {
+      setTimeout(() => this.setLayoutSizes(), 200);
+    });
   }
 
   componentDidUpdate(prevProps) {

bigbluebutton-html5/imports/ui/components/media/service.js

@@ -53,6 +53,7 @@ const setSwapLayout = () => {
 };
 
 const toggleSwapLayout = () => {
+  window.dispatchEvent(new Event('togglePresentationHide'));
   swapLayout.value = !swapLayout.value;
   swapLayout.tracker.changed();
 };

bigbluebutton-html5/imports/ui/components/presentation/component.jsx

@@ -120,11 +120,9 @@ class PresentationArea extends PureComponent {
       layoutContextState,
     } = this.props;
 
-    const { presentationAreaWidth, presentationAreaHeight } = this.state;
+    const { numUsersVideo } = layoutContextState;
-    const { presentationAreaSize, numUsersVideo } = layoutContextState;
     const { layoutContextState: prevLayoutContextState } = prevProps;
     const {
-      presentationAreaSize: prevPresentationAreaSize,
       numUsersVideo: prevNumUsersVideo,
     } = prevLayoutContextState;