[APP] Tatting Designer update - bug fix

Hello~

Some critical bugs has been fixed and updated to Tatting Designer.

Release Notes
ver 0.1a
- bug fix : The problem with picot remaining on the screen after undoing the paste of ring/chain with picot is fixed.
- bug fix : The problem with unable to edit the ring/chain with repeat 1 has been pasted or loaded is fixed.
- bug fix : Selection box will no longer appear on the image when PNG export.
- Now the background color for PNG export will appear as you choose. You can also select transparent.

When you find a bug, please tell us through e-mail lridel2013@gmail.com
Don’t forget to add bug reproducing steps too. It will help us to improve the app. Thank you!