Images correlation: temporary editable support layer to interpolate location of non-geotagged images

[Don-vip]

From images correlation dialog, offer a way to create a temporary "support layer" inferred from the location of a few reference images (geolocated). New waypoints can be manually added along the known track, time be set using add/tag dialog, and the correlation reacts in real-time.

(will post a gif showing this later)

[Don-vip]

In 18078/josm:

see #21144 - Images correlation: temporary editable support layer to interpolate location of non-geotagged images

[Don-vip]

In 18194/josm:

see #21144 - use the selected GPX layer as support instead of the faux GPX data from geotagged images

[Don-vip]

In 18196/josm:

see #21144 - make sure GPX combobox is updated when the GPX layer is deleted, even when the gpx layer is destroyed before the correlation listener is called

[Don-vip]

In 18233/josm:

see #21144 - fix #21330 - fix #21335 - proper handling of correlation support layers in "duplicate" and "gpx export" actions

[Don-vip]

In 18237/josm:

see #21144 - fix #21334 - fix correlated image direction when position is between 2 gpx points

[Don-vip]

In 18243/josm:

see #21144 - see #21334 - add debug logs + fix coverity 1464077 (Logically dead code: nextWp cannot be null with the isLast branch, but Eclipse doesn't see it)

[Don-vip]

Milestone renamed