Bug 1691214 - Take focus from window.open etc even if we're already active. r=hsivonen

With multiple windows, being active doesn't guarantee being in the
foreground window.

Differential Revision: https://phabricator.services.mozilla.com/D104326

docshell/base/nsDocShell.cpp

@@ -9180,7 +9180,6 @@ nsresult nsDocShell::InternalLoad(nsDocShellLoadState* aLoadState,
   const bool shouldTakeFocus =
       aLoadState->SourceBrowsingContext() &&
       aLoadState->SourceBrowsingContext()->IsActive() &&
-      !mBrowsingContext->IsActive() &&
       !Preferences::GetBool("browser.tabs.loadDivertedInBackground", false);
 
   mOriginalUriString.Truncate();