Unify settings designs between mobile&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. ...

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