Try to fix some Quick Launch issues b=368148 r=CTho

xpfe/bootstrap/nsNativeAppSupportWin.cpp

@@ -2649,6 +2649,7 @@ nsNativeAppSupportWin::OnLastWindowClosing() {
     // in StartServerMode(), don't do anything.
     if ( mInitialWindowActive ) {
         mInitialWindowActive = PR_FALSE;
+        mShouldShowUI = PR_TRUE;
         return NS_OK;
     }