adds the dialog to the MedianFilterStep

Signed-off-by: mrzl <marzzzel@gmail.com>
adds the dialog to the OpenStep #80

Signed-off-by: mrzl <marzzzel@gmail.com>
adds the dialog for the OpenStep #80

Signed-off-by: mrzl <marzzzel@gmail.com>
adds a gui to the GradientStep #80

Signed-off-by: mrzl <marzzzel@gmail.com>
adds a gui to the GradientStep #80

Signed-off-by: mrzl <marzzzel@gmail.com>
adds a dialog to the TopHatStep #80

Signed-off-by: mrzl <marzzzel@gmail.com>