Feature Request: Multi-account support

[tandy-1000]

Is your feature request related to a problem? Please describe.

Hydrogen is the only other web client which offer multi-account support, it would be nice to have a more modern client with this feature.

Describe the solution you'd like

Hydrogen does it like this:

[viasux]

Would love this! <3 - Also if it could be multi account across other homeservers as well!~

[redthing1]

This would be awesome.