Convert detachChangesets to be a bulk operation
Created by: eseliger
This makes detachChangesets a proper bulk operation, so it appears in the UI and behaves the same as commenting.
Closes https://github.com/sourcegraph/sourcegraph/issues/20900
Created by: eseliger
This makes detachChangesets a proper bulk operation, so it appears in the UI and behaves the same as commenting.
Closes https://github.com/sourcegraph/sourcegraph/issues/20900