Showing all joinable teams clutters the list of teams too much

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Feature request

Which Nextcloud Version are you currently using: Latest cloud.nc

Is your feature request related to a problem? Please describe.
The list of Teams seems overwhelming because when using "Show all teams", really all teams are shown, including ones you are not part of:

Describe the solution you'd like
It would be better if the teams you can possibly join are not directly shown in the list, but instead available similar like in Talk with "Join open conversations". Clicking the "+" next to the "Teams" heading could open a menu with:

• Create new team
• Join open teams

Then "Join open teams" would open a modal just like in Talk.

For reference
"Join open conversations" flow in Talk:

Start by locating the current Teams list and comparing it with the referenced Talk “Join open conversations” flow. Implement access to open teams through a menu beside the Teams heading and a modal, while keeping non-member teams out of the main list; confirm that creating a team and joining open teams remain available.