Pressing Enter Refreshes the Add Category Form Page

[MarG66]

Preconditions:
The user must be logged in on the "Categorii activitati" page.

Steps to Reproduce:

1. Click on the "Adauga Categorie" button
2. Click on the "Denumire tip activitate" input
3. Press the Enter key

Expected Results:
3. No action is taken.

Actual Results:
3. The page is refreshed.

Note:
The bug can be reproduced by clicking on any inputs except "Alege imagine" pictures.