Remove unused prefs.
Catch exception
Fix type hint.
Don't run this step if the adapter is sqlite.

Sqlite doesn't support the complicated joins used in Ansel 1.x tag
handling. This is preventing the migrations from completing on Sqlite,
which should otherwise be fine with Ansel.
ws
For some reason, sqlite requires this to be explicitly set.
Add migration to fix autoincrement fields for sqlite.

A previous migration step changed the type to unsigned or bigint
which apparently caused sqlite to lose the autoincrement field.
Update package.xml filelist.
changes
For some reason, the sidebar doesn't display unless there is *some*
output in the main content area.