Bug/fix option editing box

[JamalAlabdullah]

Description

-Fixed closing fieldset for every charachter the user types in option value or when moving to another properites (ledetekst, beskrivelse, and hjelpetekst)after typing in option value.

Related Issue(s)

• #12551

Verification

• [x] Your code builds clean without any errors or warnings
• [x] Manual testing done (required)
• [x] Relevant automated test added (if you find this hard, leave it and we'll help out)

Documentation

• [ ] User documentation is updated with a separate linked PR in altinn-studio-docs. (if applicable)