Manage lesson resources - The already added lesson resources are not marked as selected in the search results

[pcenov]

Observed behavior

If I have already added some resources to a lesson, when I open the 'Manage lesson resources' side panel then these resources are displayed as preselected. However if I make a search for the same resources then they are displayed as selectable:

search.results.not.selected.mp4

Expected behavior

Any resources which have been already added to the lesson should be marked as preselected in the search results.

Steps to reproduce the issue

1. Install the Kolibri 0.18 alpha1 build
2. Navigate to Class > Lessons > Lesson and click "Manage resources"
3. Add the resource to the lesson
4. Reopen the 'Manage lesson resources' side panel and search for the same resource
5. Observe that it's not preselected

Usage Details

Kolibri 0.18 alpha1
Windows 11, Ubuntu 22 - Chrome, Firefox

[pcenov]

@radinamatic @marcellamaki