Adds a 'Minimum search query length' setting (1–4, default 3). The admin
shows a warning when the analyzer or min-search-length have changed since
the last index build.
After a mapping change (e.g. the parent-child restructure), existing installs
need to rebuild their index. A DashboardWidget appears on the admin page
warning the admin and showing the command to run. Compatibility is tracked
via the blomstra-search.index-compatible setting.
Bart van Bragt
Daniël Klabbers
Daniel Klabbers