Added pagination and filter support for subscriptions in the test console

[malincrist]

Problem

The subscriptions dropdown from the test console only shows he first 100 subscriptions. If a user has more, they do not have the possibility to select some of them form this dropdown.

Solution

Added support for pagination and filtering in the subscriptions dropdown from the test console:

• the subscriptions are paginated and the user can navigate through all the pages of subscriptions
• the subscriptions can be filtered by typing in the searchbox

Below is a recording of the new behavior:

[github-actions[bot]]

Accessibility Insights Action: All applicable checks passed

• URLs: 13 URL(s) passed, and 0 were not scannable
• Rules: 27 check(s) passed, and 25 were not applicable

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  This scan used axe-core 4.3.2 with Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36.