Qt: Remove Dolphin prefix from NetPlay window titles

This makes the NetPlay window titles consistent with other window titles in Dolphin.

Source/Core/DolphinQt2/NetPlay/NetPlayDialog.cpp

@@ -51,7 +51,7 @@ NetPlayDialog::NetPlayDialog(QWidget* parent)
 {
   setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
 
-  setWindowTitle(tr("Dolphin NetPlay"));
+  setWindowTitle(tr("NetPlay"));
 
   m_pad_mapping = new PadMappingDialog(this);
   m_md5_dialog = new MD5Dialog(this);

Source/Core/DolphinQt2/NetPlay/NetPlaySetupDialog.cpp

@@ -24,7 +24,7 @@
 NetPlaySetupDialog::NetPlaySetupDialog(QWidget* parent)
     : QDialog(parent), m_game_list_model(Settings::Instance().GetGameListModel())
 {
-  setWindowTitle(tr("Dolphin NetPlay Setup"));
+  setWindowTitle(tr("NetPlay Setup"));
   setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
 
   CreateMainLayout();