Fix onCrmUiSelect to use current scope and apply to the digest cycle

[colemanw]

Overview

Fixes the new onCrmUiSelect directive introduced in #20789

Before

Operates outside of current scope and outside the digest cycle.

After

Works as expected.

[civibot]

(Standard links)

• If this is your first pull-request for CiviCRM, please browse CONTRIBUTING.md for information about the development and testing processes.
• If you are reviewing this pull-request, you may wish to consult the test sites and the Review Standards (long template, short template).

[totten]

I tested this (r-run) with the draft msgtplui extension and confirmed that it still works there. The main "New Mailing" screen doesn't yet use this, IIRC.

The patch makes sense on general grounds -- e.g. it does read like it was running outside the regular digest cycle.

I'm not entirely certain why this didn't manifest as quirkiness in previous usage. (FWIW, this code was borrowed from ang/crmMailing/Token.js.) Maybe some happenstance in the particular screen/UI/use-case (e.g. something else that triggers digest around the needful time).

Test failure in CRM_Core_DAOTest.testSqlModePresent looks unrelated. Merging.