[loading window] Theme loading should also list itself in the loading window.

src/ThemeManager.cpp

@@ -8,6 +8,7 @@
 #include "RageTimer.h"
 #include "FontCharAliases.h"
 #include "arch/ArchHooks/ArchHooks.h"
+#include "arch/LoadingWindow/LoadingWindow.h"
 #include "arch/Dialog/Dialog.h"
 #include "RageFile.h"
 #if !defined(SMPACKAGE)
@@ -397,6 +398,8 @@ void ThemeManager::SwitchThemeAndLanguage( const RString &sThemeName_, const RSt
 	if( bNothingChanging && !bForceThemeReload )
 		return;
 
+	if(pLoadingWindow) pLoadingWindow->SetText("Loading theme & language...");
+
 	m_bPseudoLocalize = bPseudoLocalize;
 
 	// Load theme metrics. If only the language is changing, this is all