Guest name dialog can't submit guest name with Enter key

[elzody]

Describe the bug
When opening an office document as a guest, you are asked to input a guest name. The dialog which appears for this does not allow you to submit the name by pressing the Enter key; you are instead forced to use your mouse to click the "Submit name" button.

To Reproduce
Steps to reproduce the behavior:

1. Be logged out
2. Visit a public share link to an office document
3. Type in a guest username in the dialog
4. Pressing Enter does not submit the name

Expected behavior
The name will be submitted either by clicking the "Submit name" button, or alternatively by pressing Enter on the keyboard, which allows for quicker movement.

Screenshot

Example