Adding below to the UI Themes seems to have worked so far:
a[href*='&returnAction=timeadmin.editTimesheetReturn'] { display: text; pointer-events: none; }
a[href*='&return_to=timeadmin.editTimesheetReturn'] { display: text; pointer-events: none; }
Do let me know if you see any issues , else, I will mark this thread as answered
Regards
NJ