await `share` before closing menu (#3173)

src/lib/sharing.ts

@@ -12,9 +12,9 @@ import {Share} from 'react-native'
  */
 export async function shareUrl(url: string) {
   if (isAndroid) {
-    Share.share({message: url})
+    await Share.share({message: url})
   } else if (isIOS) {
-    Share.share({url})
+    await Share.share({url})
   } else {
     // React Native Share is not supported by web. Web Share API
     // has increasing but not full support, so default to clipboard