Afform - Allow picking icon for tab, add CrmUiIconPicker widget #23919
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Overview
When embedding an afform in the contact summary tab, this allows you to pick an icon.
This also adds the correct icon to the Grants tab for the CiviGrant extension.
Also see: https://lab.civicrm.org/extensions/certifications/-/issues/9
Before
Icon could be customized with the Contact Layout Editor, which works for local customizations but not for packaged Afforms.
After
Icon can be specified in Afform GUI, and in packaged Afform json.
Technical Details
Since this is needed in several places, this adds a general purpose crmUiIconPicker widget to crmUi.
It also switches Afforms's hook_civicrm_tabset to use the API, which ensures virtual forms get picked up.