matrix.to: Cannot open links with query parameters

#3990

The string can come percent encoded but we parse it with ascii chars ("?", "&", ...).
So, remove one layer of encoding to fix the bug.

Riot/Modules/Application/LegacyAppDelegate.m

@@ -1255,6 +1255,10 @@ NSString *const AppDelegateUniversalLinkDidChangeNotification = @"AppDelegateUni
     
     NSLog(@"[AppDelegate] Universal link: handleUniversalLinkFragment: %@", fragment);
     
+    // Make sure we have plain utf8 character for separators
+    fragment = [fragment stringByRemovingPercentEncoding];
+    NSLog(@"[AppDelegate] Universal link: handleUniversalLinkFragment: %@", fragment);
+    
     // The app manages only one universal link at a time
     // Discard any pending one
     [self resetPendingUniversalLink];