I have been working on Pencil last night. I fixed some issues with the colour wheel that was incompatible with the colour palette.
In the way the code is done right now, one has to use the colour palette when drawing on a Vector layer. Each vector stroke is linked to a colour in the colour palette so when changing the colour in the colour wheel updates the current selected colour in the colour palette and all the vector strokes that have been made with this palette colour.
Changing this behaviour at this point requires a lot of refactoring so I left it like that as it is usable. It can be even quite useful if we want to ajust colours in one go in the entire project. We just need to show users how it works.
Bitmap drawings are not concerned by this as each stroke are independant.
You can have a look at the latest updates on my branch
I don’t have access to a Windows PC right now so I am not able to build a binary. I am only using Linux. The best thing you could do is install QTCreator on your PC and build the app from there. You need to download the source of the project, open the pencil.pro file with QTCreator, validate the default configuration and click the run button.Opefully, there will be no error and you will see the Pencil window opening.
I will do a pull request to the main branch.
PS : I have also fixed the behaviour of the onion skin.