Part of #82877 When drawing specialized cursors for the different paint modes via the `wmPaintCursor` draw callback, tablet tilt direction is unavailable to use to customize the drawing for the user. To enable this functionality, this commit adds the `x_tilt` and `y_tilt` data read while processing MOUSEMOVE events to the `eventstate` variable so it can be used by consuming functions. Pull Request: https://projects.blender.org/blender/blender/pulls/137189