Bug 1966349 - Make sure NavigateEvent is initialized correctly. r=jjaschke

Make sure the  properties downloadRequest and userInitiated get their
correct values.

Differential Revision: https://phabricator.services.mozilla.com/D249243

docshell/base/nsDocShell.cpp

@@ -12979,6 +12979,7 @@ nsresult nsDocShell::OnLinkClick(
   loadState->SetTextDirectiveUserActivation(
       ownerDoc->ConsumeTextDirectiveUserActivation() ||
       hasValidUserGestureActivation);
+  loadState->SetUserNavigationInvolvement(aUserInvolvement);
 
   nsCOMPtr<nsIRunnable> ev = new OnLinkClickEvent(
       this, aContent, loadState, noOpenerImplied, aTriggeringPrincipal);