[FEATURE] Trust: Disable Remove on incoming trust (RT-1878)

There is no point on trying to delete an incoming trust, so disable
its button and notify the user with a tooltip.

RT-1878 #review #time 1h 40m
[FIX] trust: Wrap disabled Remove btn in span

Otherwise `rp-popover` is not triggered on `disabled` button.
[TASK] trust: Enhance Remove btn code for isIncoming
Merge pull request #1804 from jublonet/feature/1878-incoming-trust-delete-error

[FEATURE] Trust: Disable Remove on incoming trust (RT-1878)