Assistant: Fix index updating on startup in the remote control mode

HelpEngineWrapper::initialDocSetupDone() should be called only once
right after the initialization of the help models. Calling it on
every small update leads to recursion.

Task-number: QTBUG-36850
(cherry picked from qttools/d55407822eefbc05f7d8bb44c53b057332b5b399)
Change-Id: I3e0390e592069a417d88fbc202a1e45cd91cc139
Reviewed-by: Shawn Rutledge <[email protected]>

Author: Alexander Volkov

tools/assistant/tools/assistant/mainwindow.cpp

@@ -398,9 +398,10 @@ void MainWindow::qtDocumentationInstalled()
 void MainWindow::checkInitState()
 {
     TRACE_OBJ
-    HelpEngineWrapper::instance().initialDocSetupDone();
-    if (!m_cmdLine->enableRemoteControl())
+    if (!m_cmdLine->enableRemoteControl()) {
+        HelpEngineWrapper::instance().initialDocSetupDone();
         return;
+    }
 
     HelpEngineWrapper &helpEngine = HelpEngineWrapper::instance();
     if (helpEngine.contentModel()->isCreatingContents()
@@ -417,6 +418,7 @@ void MainWindow::checkInitState()
             disconnect(helpEngine.contentModel(), 0, this, 0);
             disconnect(helpEngine.indexModel(), 0, this, 0);
         }
+        HelpEngineWrapper::instance().initialDocSetupDone();
         emit initDone();
     }
 }