The RNA path that is generated for Editor properties were mostly
incomplete (e.g. the viewport overlay settings).
- in python tooltips
- from the Copy (Full) Data Path operator
- python methods path_from_id, path_resolve returned incomplete paths

Since a space (editor) is ultimately owned by the screen, we now add the
missing "areas[x].spaces[x]" subpath to any editor.
Nested structs (like the viewport overlay) also need to include this
subpath.

Some editor related structs are not tied to a single space though (and
these cases are therefor not resolved yet):
- Dopesheet is referenced from SpaceGraph, SpaceAction and SpaceNla
- View3DShading is referenced from SpaceView3D but render engines as
well
- FileSelectParams / FileAssetSelectParams / FileAssetSelectIDFilter
need more investigation

NOTE: in case of the VSE, to make this work this also changes the
overlays to be tied to SpaceSeq (the only editor using them)
NOTE: since the above is now in place, adding VSE overlay props to Quick
favourites is now made possible as well (was a leftover from !116604)

Fixes #124527, #113489

@@ -870,1 +872,4 @@
 
+std::optional<std::string> BKE_screen_path_from_screen_to_space(const PointerRNA *ptr)
+{
+  bScreen *screen = (bScreen *)ptr->owner_id;

@@ -871,0 +873,4 @@
+std::optional<std::string> BKE_screen_path_from_screen_to_space(const PointerRNA *ptr)
+{
+  bScreen *screen = (bScreen *)ptr->owner_id;
+  SpaceLink *link = (SpaceLink *)ptr->data;