Warn before recursively leaving and bricking many rooms when leaving a space

[rda0]

Steps to reproduce

1. Use a private spaces tree to organize all your rooms
2. Leave the space
3. Select Leave all rooms and spaces (randomly or by accident)
4. Notice that you lost access to all private rooms and abandoned all rooms where you were the only admin

What did you expect?

A very prominent popup dialog warning the user that this action could be dangerous and will result in unrecoverable loss of rooms and access permissions. Example:

Are you really sure you want to:

• leave XXX public rooms
• leave XXX private rooms and loose access
• abandon (brick) XXX private rooms where you are the only admin (probably loosing them forever)

What happened?

No warning.

Notes

This actually happened to one of my co-workers, who knows Matrix very well. The co-worker wanted to leave a private test space and just selected the wrong option when leaving. I think the main action is leaving a space and an option to recursively leave all contained rooms should maybe even be hidden behind an advanced option (like the UI for creating unfederated rooms).

The leave space dialog:

only mentions that you are about to leave a space and could loose control over the space if you are the only admin. There is no warning that you will loose access to rooms or control over rooms.

We believe this option (without an additional clear and prominent warning dialog and a red button to confirm) is too dangerous for our users.

Operating system

Linux Fedora 35pre

Browser information

FF92

URL for webapp

https://staging-element.phys.ethz.ch/ (1.8.6-rc.1)

Homeserver

phys.ethz.ch

Have you submitted a rageshake?

No

[rda0]

Related #18592