Color Picker: fix dead dialog showing under the new one after rotation

to replicate: open the picker, rotate to landscape, press the back
button or rotate to portrait and press the back button, you'll see
the dead old view

Signed-off-by: xyyx <xyyx@mail.ru>

src/net/margaritov/preference/colorpicker/ColorPickerDialog.java

@@ -144,6 +144,7 @@ public class ColorPickerDialog extends AlertDialog implements ColorPickerView.On
         Bundle state = super.onSaveInstanceState();
         state.putInt("old_color", mOldColor.getColor());
         state.putInt("new_color", mNewColor.getColor());
+        dismiss();
         return state;
     }