[native] Introduce disable link button
The button is visible only when a link is present.
Clicking the button results in alert being shown where a user is asked to confirm the action.
Confirming results in the link being disabled.
Depends on D7907
Check if the button appears only when a link is present.
Check if clicking it results in an alert.
Check if canceling doesn't disable the link.
Check if confirming disables the link.
Reviewers: bartek, kamil, inka
Reviewed By: bartek, kamil
Subscribers: ashoat, atul, ted
Differential Revision: https://phab.comm.dev/D7908