For the time being, I think the following will work but I'll have to double-check it in-game.
Make sure maintained window settings are set to Frame+Titlebar...
then enter the following command in the chat window (caps matter).
Code:
/show_window MainHUD.Maintained.WC_Titlebar
Might want to macro this. You'll need to issue this command each time you log or swap toons and the window may reset mid-game.
Still haven't confirmed the folowing works but you might also try opening eq2ui_mainhud_maintined.xml in Notepad. Search for name="WC_Titlebar" and on that same line of code change
Visible="false"
to
Visible="true"