Submission form issues

[milanmajchrak]

• Missing * for required field Missing * for required field #850
• It is not clear what the errors are during the creation of the submission #774
• Choose type of the submission by an image (during creation of an item) #464
• Submission: Describe step - add hint english only Submission: Describe step - add hint english only #582
• Indexing of complex component fields _comp Indexing of complex component fields _comp #622
• UFAL/Submission-form change hasMetadata to hasCMDI UFAL/Submission-form change hasMetadata to hasCMDI #868
• UFAL/Submission-forms CZ language - the Type shouldn't be repeatable UFAL/Submission-forms CZ language - the Type shouldn't be repeatable #869