Handle special characters in User Group name

[kopitek8]

### Tasks
- [ ] Handle special characters when transferring user group name from Firebase to Postgres
- [x] Show a warning on the consequences of using special characters for using group name

[kopitek8]

We need to add a warning banner or a simple text on the the user group create pop up modal

[frozenhelium]

@thenav56 Is there anything we need to do to support special characters in the UserGroup name field in the DB?

[kopitek8]

@Katbaloo

We have added only a warning for now while creating users.