Lexical Inventory, styling of individual morph forms, optional disabling of retrieval

Changes the visual output for individual morphological forms.

They now are immutable - if you want to edit the form, you have to create a new one.

There's more to it, you will be able to submit a form to the Lexical Inventory perhaps, or report errors when a morphological parse is wrong. - Nothing implemented, only hints present.

For demostrator purposes we retrieve Lexical Inventory links to dictionaries. A feature that will grow hopefully by a lot in the future.

For situations like an exam, retrieval of morphological forms can now be turned off by adding a `"noRetrieval" : true` to the morph config.