Crashfix: Filter Dialog after the canvas is closed
KisDlgFilter depends on canvasBase() for cleaning its state. We can't rely
on QCloseEvent & DeleteOnClose, since it can arrive after the canvas has
been destroyed, causing a crash.
KisDlgFilter depends on canvasBase() for cleaning its state. We can't rely
on QCloseEvent & DeleteOnClose, since it can arrive after the canvas has
been destroyed, causing a crash.