Blender Git Loki

Don't deselect assets in `ED_fileselect_activate_by_id`

`ED_fileselect_activate_by_id()` activates an asset (i.e. marks it as
the active asset in the asset browser). To avoid an "active but not
selected" state, it also selects it.

Before this commit, the function would also deselect all other assets,
but that's considered doing too much. If deselection is required, the
`ED_fileselect_deselect_all()` function can be called.

Manifest Task: T92152