Makes the FHIR resource list searchable

[vishnuravi]

Makes the FHIR resource list searchable

:recycle: Current situation & Problem

The list of FHIR resources is currently not searchable.

:bulb: Proposed solution

Adds a field that filters the list of FHIR resources by substring search on the display name.

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[vishnuravi]

Thanks for the suggestions @PSchmiedmayer - let me know if the changes I've made are what you had in mind.