Add support for changing the InputBox's title to the description text provided by the game(or the emulator itself). If none is provided(empty string), fall back to a default string.

UI/MenuScreens.cpp

@@ -1552,7 +1552,7 @@ void SystemScreen::render() {
 		char name[name_len];
 		memset(name, 0, sizeof(name));
 
-		if(InputBox_GetString(MainWindow::GetHInstance(), MainWindow::hwndMain, NULL, "PPSSPP", name, name_len))
+		if(InputBox_GetString(MainWindow::GetHInstance(), MainWindow::hwndMain, "Enter a new PSP nickname", "PPSSPP", name, name_len))
 			g_Config.sNickName.assign(name);
 		else
 			g_Config.sNickName.assign("PPSSPP");