HP-555 Feat/disco tag dropdown viewer

[mfshao]

Jira Ticket: HP-555

Add new "searchable tags panel" to discovery page, replacing the old tags area.

This is an optional UI change and can be turned on by putting the following into portal config discoveryConfig.features.search section, see portal-config.md for more info

"tagSearchDropdown": {
"enabled": true
}

Deployed in: https://qa-heal.planx-pla.net/

New Features

• Discovery: new "searchable tags panel" can be enabled via config

Improvements

• Discovery: tags now are sorted by alphabetic orders

Deployment changes

• Discovery: introduced a new config section discoveryConfig.features.search.tagSearchDropdown, see portal-config.md for more info

[mpingram]

LGTM