Crew and cast members are hidden upon project creation

Steps:

1. https://kafe.fi.muni.cz/auth/lemmafimuni/ - click "Create a project"
2. Fill in any required fields and most importantly, add a Crew person and/or a Cast person
3. Click "Create project"

Expected result: The crew and cast members are present
Actual result: There are no members of crew nor cast

Note: The check for cast members being necessary during future edits is showing that nothing is missing.