Support custom fields in the filter of JWM board itself

Issue Summary

Currently, the issues on the JWM board can be filtered through some fields.
Filtering in Board, List, Timeline, and Calendar Views have multiple options to filter issues. Nevertheless, we can't select all of the available custom fields (through a custom search) within the filter section.

It would be great to include this custom option for all of the JWM views.

Expected Results

No option to add a custom filter or select more custom fields in the JWM project itself.

Actual Results

No option to add a custom filter or select more custom fields in the JWM project itself.

Workaround

N/A