Project Space Name textfield validation is not in concruent with create project space button validation

[Steffengreiner]

Describe the bug
The Project Space Name textfield validation is not concruent with the create project space button validation:
See the following movie for examples:
https://user-images.githubusercontent.com/29627977/128865058-003eb962-788c-483d-9f20-4df9cf17243b.mov

To Reproduce
Steps to reproduce the behavior:

Bug A:

1. Select offer for which a project space should be created in OfferOverViewView
2. Click "create a new project space" radio button
3. Input project space name smaller than 3 characters without invalid characters
4. Observe project space name is valid label
5. Input valid project code
6. Create project space button is greyed out.

Bug B:

1. Select offer for which a project space should be created in OfferOverViewView
2. Click "create a new project space" radio button
3. Input project space name bigger than 1 character without an invalid characters
4. Observe project space name is valid label
5. Input valid project code
6. Create project space button is clickable
7. Remove characters from project space name textfield
8. Create project space button is still clickable and textfield validation label indicates project space name as valid

Expected behavior
The project space validation label should be concruent with the validation of the project space button