Unify designs between mobile and desktop

[siepra]

In order to make UI designing process easier, we'll unify some views/components between platforms (see. settings section)

This may be a good point to try to share components between mobile&desktop as well. Probably the essential components like buttons, typography, views/divs must remain separate but the major ones (like "Add members", "Create channel") can be shared. The greatest risk here is to dynamically import those basic components into their parents.

[holmesworcester]

Related: all issues labeled "new-style settings": https://github.com/TryQuiet/quiet/labels/new-style%20settings

e.g. ...

#615
#41
#1349
#1683
#866
#1090
#1536
#1503
#1504
#1502
#1716