Better labeling of images and stickers

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

src/components/views/messages/MImageBody.tsx

@@ -451,7 +451,7 @@ export default class MImageBody extends React.Component<IProps, IState> {
     }
 
     // Overidden by MStickerBody
-    protected getFileBody(): JSX.Element {
+    protected getFileBody(): string | JSX.Element {
         return <MFileBody {...this.props} decryptedBlob={this.state.decryptedBlob} showGenericPlaceholder={false} />;
     }