GD Paint Demo Update to 4.0

[voylin]

Part of #697
Demo is working now in 4.0.
There is only one slight issue, but that has to do with the engine viewport system I think. When saving the picture, the framing isn't always correct, really depends how you scaled the window. This could also be a me issue as I use i3 on linux (Tiling window manager).

But otherwise, it's working perfectly.

[aaronfranke]

There is only one slight issue, but that has to do with the engine viewport system I think. When saving the picture, the framing isn't always correct, really depends how you scaled the window. This could also be a me issue as I use i3 on linux (Tiling window manager).

I can reproduce this issue, and that's not the only one. I'm also having an issue where the brush strokes appear on top of the UI.

[voylin]

There is only one slight issue, but that has to do with the engine viewport system I think. When saving the picture, the framing isn't always correct, really depends how you scaled the window. This could also be a me issue as I use i3 on linux (Tiling window manager).

I can reproduce this issue, and that's not the only one. I'm also having an issue where the brush strokes appear on top of the UI.

I'll try fixing it. Not sure if an engine issue or not. I don't have the drawing over the UI issue strangely enough.

[voylin]

@aaronfranke Fixed the issues in #741. Saving also works now after trying to figure out what was wrong with the window.