This regression was introduced as part of01fd96240c(2015-02-23, ChangeScreen: do not show history twice) Looking through the whole ChangeScreen class, there is just one occurrence of the strategy UI field, which was introduced inaedb0bb6c7(2013-11-25, ChangeScreen2: Hide strategy row if no strategy is displayed) to disable row when we're displaying a non current revision. Change-Id: Ida3162e9d5c008d373e399d49501b0fb19c44cb4