Move some code into MainWindow and make it internal stuff

That MainWindow uses ProfileList is an internal implementation detail.
The Higher lever Application does not need to know about it.

src/MainWindow.cpp

@@ -116,6 +116,8 @@ MainWindow::MainWindow()
     // emulator (as they are reserved for use by terminal applications)
     correctShortcuts();
 
+    setProfileList(new ProfileList(true, this));
+
     // this must come at the end
     applyKonsoleSettings();
     connect(KonsoleSettings::self(), SIGNAL(configChanged()), this, SLOT(applyKonsoleSettings()));