* Added a text field that allows choosing custom homeserver in "Room directory" dialog.
* Moved "Choose custom homeserver" text field to the right and shrinked it to 30% of "Room directory" dialog's width.
* Adding "server_name=" when needed when joining room.
When joining room that is hosted on a different homeserver than
the account is registered on, the request fails. In such scenario
the server has to be explicitly mentioned in a server_name URL
parameter. More info here:
https://matrix.org/docs/spec/client_server/r0.6.1#post-matrix-client-r0-join-roomidoralias
* Minor fix: intentation (4 spaces -> 8 spaces)
Co-authored-by: Patryk Cisek <patryk@cisek.email>
