Add standard shortcut for print action.

Also update Visual Studio keyboard scheme. Xcode already had a proper
key binding.

Reviewed-by: con

share/qtcreator/schemes/MS_Visual_C++.kms

@@ -127,7 +127,7 @@
   <key value="Ctrl+Shift+S" />
  </shortcut>
  <shortcut id="QtCreator.Print" >
-  <key value="" />
+  <key value="Ctrl+P" />
  </shortcut>
  <shortcut id="QtCreator.Exit" >
   <key value="Ctrl+Q" />

src/plugins/coreplugin/mainwindow.cpp

@@ -603,6 +603,7 @@ void MainWindow::registerDefaultActions()
     icon = QIcon::fromTheme(QLatin1String("document-print"));
     tmpaction = new QAction(icon, tr("&Print..."), this);
     cmd = am->registerAction(tmpaction, Constants::PRINT, m_globalContext);
+    cmd->setDefaultKeySequence(QKeySequence::Print);
     mfile->addAction(cmd, Constants::G_FILE_PRINT);
 
     // Exit Action