Users can now group the apps and modules list by status, making it easier to see which modules are installed, uninstalled, or in an error state. This helps administrators quickly spot modules needing attention without manually scanning the full list.

Description of the issue/feature this PR addresses:

add a filter to group by state.


@nim-odoo 



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A new automated test verifies that marketing automation correctly handles unique field filtering, including cases involving related records. This helps prevent regressions in campaign targeting logic and supports more reliable marketing workflows.

Commit refactored the unique field filtering.
We add a test to check correctness of this method.
The commit is added in master as opposed to v11 as we need a test class with
a relational field.

opw 1912026