ats: add missing compiler mode and AnsiString directive to unit.
ats: add missing compiler mode and AnsiString directive to unit.

Thanks to Echi for reporting this.

wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI