### Steps to reproduce

1. Go to the share modal Begin of the insertion
1. Type in some characters not belonging to the user (the Invite shows up) but don't select the option
2. Type in some characters belonging to an existing user but don't select the option
3. Type in some characters not belonging to the user and click the invite optionEnd of the insertion
2. Begin of the deletion Without having selected a user,End of the deletion click the Begin of the insertion'Share'End of the insertion Begin of the deletion 'Invite'End of the deletion button

### What is the buggy behavior?

* Full screen share modal is displayed

### What is the expected behavior?

* No change in the modal. Ideally, the user should be prompted to select a user before clicking