Conform more of the code base to strict null checking (#10147)

* Conform more of the code base to strict null checking

* More strict fixes

* More strict work

* Fix missing optional type

* Iterate

src/components/views/avatars/MemberAvatar.tsx

@@ -109,7 +109,7 @@ export default function MemberAvatar({
 }
 
 export class LegacyMemberAvatar extends React.Component<IProps> {
-    public render(): JSX.Element {
+    public render(): React.ReactNode {
         return <MemberAvatar {...this.props}>{this.props.children}</MemberAvatar>;
     }
 }

src/components/views/avatars/RoomAvatar.tsx

@@ -135,7 +135,7 @@ export default class RoomAvatar extends React.Component<IProps, IState> {
         return this.props.room?.roomId || this.props.oobData?.roomId;
     }
 
-    public render(): JSX.Element {
+    public render(): React.ReactNode {
         const { room, oobData, viewAvatarOnClick, onClick, className, ...otherProps } = this.props;
         const roomName = room?.name ?? oobData.name;