[ZhuchkaTriplesix]

Summary

#1250 added most of the #1149 widget tests. This covers what its acceptance still lacked:

• SQLite joins PostgreSQL and MySQL in the check that referenced tables sit left and referencing ones right.
• Opening a neighbour through the host. A double click without a custom onOpenNeighbour goes through QueryaCommandHost.onOpenSchemaObject: it opens orders in public, as a table, and asks for the new tab to start in Relations. The existing test covered only the custom callback.
• Data → Relations → Data keeps the quick filter, as well as the staged edits and the page.
• A materialized view offers no switch, like a view.

pumpGenericTableView takes isMaterializedView and onOpenSchemaObject; with the latter, the view is wrapped in a QueryaCommandHost.

Not covered here: "Return to …" after opening a neighbour. That button belongs to the workspace home's last selected object, not to the table view.

Refs #1149

Test plan

• CI: all test sections pass (no local runs, per team rule)