Fix interface dropdown component names

[benosman]

I noticed that the interface dropdowns for font and tools do not work in the latest Directus v9 versions.

This change converts dropdown to select-dropdown and dropdown-multiselect to select-multiple-dropdown.

It also fixes a typo with delimeter instead of delimiter

I haven't generated the dist version of the extension as with recent package update, some extra dependencies may be needed.

[dimitrov-adrian]

Thanks for the contribution!