- New check for full indexing completion
- Renamed `hasInitialIndexCompleted` to `hasFullIndexCompleted` for clarity.
- Removed file:initial event (no longer required and not documented for public consumption)
Hopefully doesn't introduce new regressions. Needs testing time "in the field".
This splits indexing into two phases:
* preindex (where only pages, space lua, space styles are indexed)
* index (where everything else is indexed)
The goal is to get to more-or-less operational state quicker this way,
because probably most functionality can already be enabled after the
pre-index phase.