Setting signer logic and computing fees.
AC messages for different transfer ownership states.
Declining ownership logic.
Added `CommunityTokensStore.qml` stub.
Removed deprecated property.
Issue #11964
- Button from community column.
- Button from community overview.
- Updated storybook pages (settings overview related) according to new components requirements.
Part of #12174
- display an info box when in wallet testnet mode with a CTA to disable
it (functionality enabled for production builds only)
- the CTA can be tested/seen via OverviewSettingsPanelPage storybook page
Closes#11468
Noelia
Patryk Osmaczko
Michał Cieślak
Lukáš Tinkl
Alex Jbanca