Comment 1 for bug 1660453

This probably should be split into two separate reports:
1) copy&paste n o longer auto-forks filter effects (there might be an existing report about that)
2) regressions in the filter editor which freeze the UI if one of the lists has a scrollbar, and the filter count is updated (disappears e.g. when zooming in/out the canvas view, or scrolling in one of the filter editor dialog's panes). Possibly that's related to earlier reports (e.g. one about the Text&Font dialog freezing in a similar way).