Layers and Importing file

[DantonSlip]

Oh hey! As discussed on Discord, I just set you a reminder about layer functionality:

• External modification checkbox: in order to import our project/file modified in Laigter.
• Adding a slider in order to make layers transparent and easing the painting process.

Thanks for all your hard work!

[azagaya]

hi! thanks for the suggestions. I'll try to add them. The slider part shouldn't be hard.