Description

This branch introduces middleground between the "action based" roles and the "predefined" role. The branch allows the company representative to invite members that can have the role speaker, booth owner and company member. The branch restricts also the option to change roles once they're set in.

User invited as a speaker can request presentation (if there is a space for presentation in the company) or join already existing presentation.

User invited as a booth owner can request booth (if such is not requested yet) or join the other booth owners.

User invited as a company member can request presentation (if there is a space for presentation in the company) or join already existing presentation, request booth (if such is not requested yet) or join the other booth owners. Once they take an action towards booth or presentation they'll become speaker or booth owner. If they don't take a decision they'll remain company members.

closes #510 (and maybe others I am not sure)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected) (MAYBE)
• This change requires a documentation update

What needs to be tested

• Register as company representative and approve the company (mod)
• Invite like 6/7 users or so
• Register/Log in as user who is company member and check that you can request a presentation (reject it as a mod so that you don't constantly migrate:fresh)
• Register/Log in as user who is company member and check that you can request a booth (reject it as a mod so that you don't constantly migrate:fresh)
• Register/Log in as user who is speaker and check that you can request a presentation (approve it as a mod)
• Register/Log in as user who is speaker and check that you can join the other presentation as speaker
• Register/Log in as user who is company member and check that you can join the other presentation as speaker
• Register/Log in as user who is booth owner and check that you can request a booth (approve it as a mod)
• Register/Log in as user who is booth owner and check that you can join the other booth owners
• Register/Log in as user who is company member and check that you can join the other booth owners

The gold sponsor was working as well but check it as well (so 2 presentations but make sure you free the gold sponsor route either from mod or from the database)

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes