Plain solution for this issue.
GitflowTaskDialogPanelProvider now extends VcsTaskDialogPanelProvider instead of TaskDialogPanelProvider, not having to implement abstract TaskDialogPanel getOpenTaskPanel(@NotNull Project, @NotNull Task), because concrete method of VcsTaskDialogPanelProvider will be dropped at once with the abstract one -- us not having to cope with that.
Plain solution for this issue.
GitflowTaskDialogPanelProvidernowextends VcsTaskDialogPanelProviderinstead ofTaskDialogPanelProvider, not having to implementabstract TaskDialogPanel getOpenTaskPanel(@NotNull Project, @NotNull Task), because concrete method ofVcsTaskDialogPanelProviderwill be dropped at once with the abstract one -- us not having to cope with that.Closes #298