Currently, the form tries to submit itself when pressing "Enter" to select a highlighted option from one of the lookups (lexical category and lexeme language). This is most definitively not what we want.
**Desired Behaviour:**
As specified in the comments below, the following behaviours were defined to not trigger any change when enter is pressed:
1. Pressing "Enter" when an option is being selected, the option is selected, the option menu closes and the Lookup is still focused.
2. Pressing "Enter" after typing something for which there is no option available, "no-results" message is shown, it does not disappear, and the field still stays in focus
**Acceptance Criteria**:
- [ ] When `Enter` is pressed in a focused lookup (both lexical category and lexeme language), the lookup remains in focus, the message stays open and a submit-attempt does not occur.