Change the Join common\space flow #1940

[roienatan]

• PR title equals to the ticket name
• I added the ticket to the Development section of this PR.

What was changed?

• New join common/space flow. See ticket for more details.

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[roienatan]

Updating regarding the current progress and what is left to be done.
Currently the redirection is disabled. For a non-member it's possible to see all the public items and it's possible to join a space/common from the chat component.

Missing functionality:

• Disable redirection only if there is at least one public item in common/space.
• Disable redirection only if the common is auto admission.
• For a space, disable redirection only if the user is a member in the parent common.