True for both `Graph` and `Dopesheet` views in the MCE.
For all other time-based editors, the main region (`RGN_TYPE_WINDOW`) is
of interest to be tagged for syncing `V2D_VIEWSYNC_SCREEN_TIME`. In the
case of the Movie Clip Editor however, the `Graph` and `Dopesheet`
regions in question are of type `RGN_TYPE_PREVIEW`.
So to resolve, we have to take this into account in view2d_sync RNA code
NOTE: this PR does not add versioning code, so any "falsely" tagged
`Graph` and `Dopesheet` view will "loose" the setting (will have to be
enabled again on the "right" region), this could be added though -- it
would be impossible to tell **which** view exactly, so on each
`RGN_TYPE_WINDOW` encountered, we'd have to then tag **both** `Graph`
and `Dopesheet` afaict
Pull Request: https://projects.blender.org/blender/blender/pulls/126785
6036163e14