Allow more flexible quick point {t} text

Lots of times when you add a not-so-quick-point you want just the date; but maybe also in a different or more compact format, maybe without spaces or hyphens or "_at_".

for example currently {t} expands to --> 2025-08-08 at 08:53

but maybe I just want 20250808

Then you have to edit the point & delete the time, delete "_at_", delete 3 hyphens. Quick?

I made a related suggestion on this @ https://help.locusmap.eu/topic/38061-display-any-other-fields-when-adding-quick-point but was declined.

BUT there is an existing mechanism in Locus for flexible date/time formatting - see settings > track recording > any-profile > track format name > Time format; and funny enough it uses the same {t} field name.

And more recently a new expert setting for the format of displaying a points timestamp @ https://help.locusmap.eu/topic/38448-default-for-new-point#comment-154426.