Motivation:
ChannelsSelectionModel.qml is freezing the app when used with a live channel that's being edited because on each channel change the selection model is re-created.
The fix for this is to use the LeftJoinModel to unify the channels selection (a light model containing only keys) and the full channels model containing the channels data. On top of this, the SortFilterProxyModel is added to decorate the model with the roles expected in the UI. Another improvement is by replacing the ExpressionRole with the FastExpressionRole.
Changes in the Permissions design:
1. If the collectible is unique the amount input is disabled. 1 is auto-selected
2. Show `Max. 1` for unique tokens and empty string for other tokens
Changes in the Airdrop design:
1. Show `Max. 1` for unique tokens
- It adds info panel when control node is offline.
- It modifies UI texts when control node is offline.
- It updates storybook updating permissions model and allowing permission state changes.
NOTE: Only UI, no backend. There is 1 expected integration point: permissions model item `permissionState` role.
Closes#11769
- header buttions/title/subtitle simplified
- no need to use states
- no need to use internal `d` object to pass data between pages
- permissions list scroll position preserved when navigation back from
other views
- storybook: allow "back" navigation to cover whole flow in sb
- fix some regressions in permissions-related pages
Alex Jbanca
Khushboo Mehta
Michał Cieślak
Noelia
Lukáš Tinkl