feat(resource): optimize resource instance form (DSP-1256)

[kilchenmann]

resolves DSP-1256

[mdelez]

I made a small fix by providing the canDelete input to the app-display-edit component as well as adding the deleteValueIsAllowed method to the properties component. Can I push my changes? Otherwise it looks good! There is a weird css issue in the add-value component but that can be handled in another PR.

[kilchenmann]

Thank you @mdelez
Yes, I will fix the css issue in a separate PR this afternoon. It will be part of the first refactoring. If it's okay I will merge this PR first...