Impove Onboarding / Membership management process

[markets]

Ref: #770

Some improvements on Register & Membership process:

• Review register process (create account and confirm email), some users get stuck in this process
• Remember users without membership (15 days after register) they should ask for membership in some Organization or the user will be deleted when user have 1 month on the platform without membersehip
• Super admin (active admin) allow to filter users without membership (we will manually manage this list and remove old users without membership)
• Fix duplicate applications Duplicate applications #763
• Force page https://www.timeoverflow.org/organizations to users logged in without membership (some users don't know what to do if they see pages like https://www.timeoverflow.org/pages/about)
• Improve text of email notifications new membership application, specify the name of the organization user want to join
• Notify orgs admins (CCO) when membership remove their membership
• On https://www.timeoverflow.org/organizations Organizations list place BdTOnline (org 402) always at the begining (it's the TimeBank that you can join if you don't find any in your location) ℹ️ NOTE Added highlighted flag to avoid hardcoding IDs

[markets]

@sseerrggii I'm still polishing some details and working in some points, but I'm unable to reproduce the 1st issue 🤔:

Review register process (create account and confirm email), some users get stuck in this process

Do you have more specific information about those problems?