Rejecting invite leads to "Want to join?" page with no back button

[BurnyBoi]

Describe the bug
When rejecting an invite, Hydrogen goes to the "Want to join?" page for the room. With the mobile layout, there is no way to go back to your room list from the UI. You have to use the browser's back button.

To Reproduce
Steps to reproduce the behavior:

1. Get invited to a room
2. Open the invite on mobile layout
3. Reject the invite

Expected behavior
Either go back to the room list when rejecting the invite, and/or include a back button on the "Want to join?" page so the user can go back.

Screenshots

Smartphone (please complete the following information):

• Device: Pinephone
• OS: Manjaro Phosh
• Browser: Firefox 105
• Version: Hydrogen 0.3.2