fix(dialog): cancel hide timeout on openDialog

Since we unmount the dialog after a timeout because of an animation we
need to cancel the timeout in case we need to render new dialog.
Otherwise the actual hiding can be executed after we render the new
dialog.

react/features/base/ui/components/web/DialogTransition.tsx

@@ -2,18 +2,29 @@ import React, { ReactElement, useEffect, useState } from 'react';
 
 export const DialogTransitionContext = React.createContext({ isUnmounting: false });
 
+type TimeoutType = ReturnType<typeof setTimeout>;
+
 const DialogTransition = ({ children }: { children: ReactElement | null; }) => {
     const [ childrenToRender, setChildrenToRender ] = useState(children);
     const [ isUnmounting, setIsUnmounting ] = useState(false);
+    const [ timeoutID, setTimeoutID ] = useState<TimeoutType | undefined>(undefined);
 
     useEffect(() => {
         if (children === null) {
             setIsUnmounting(true);
-            setTimeout(() => {
-                setChildrenToRender(children);
-                setIsUnmounting(false);
-            }, 150);
+            if (typeof timeoutID === 'undefined') {
+                setTimeoutID(setTimeout(() => {
+                    setChildrenToRender(children);
+                    setIsUnmounting(false);
+                    setTimeoutID(undefined);
+                }, 150));
+            }
         } else {
+            if (typeof timeoutID !== 'undefined') {
+                clearTimeout(timeoutID);
+                setTimeoutID(undefined);
+                setIsUnmounting(false);
+            }
             setChildrenToRender(children);
         }
     }, [ children ]);