With grid enabled closing a contour can instead create a subdivision in some cases.

[MatthewBlanchard]

Not sure what's causing this exactly, but it's definitely an issue and something I don't want to forget about.

[MatthewBlanchard]

Just figured this out. The distance from the point used in point picking is less than that used for adding a subdivision to a contour. This is something that just needs a bit of tweaking. It is specifically an issue with the grid because of how we're clamping the mouse coordinates to the grid coordinates.

[MatthewBlanchard]

Fixed the part of this bug that caused the point_idx to change relative to the contour. The rest of this issue is more of an enhancement that I'll get to.