The fix for #105363 (6d3ce8273a) made the transform system respect
(Frame) nodes `offsetx`/`offsety`.
Now Node Editors run the transform system even if the mouse is still (due to edge panning -- unnecessarily, see PR #106301 for fixing this). And due to the way `frame_node_prepare_for_draw` recalculates these offsets (based on
on updated positions and `node.runtime->totr` [which in turn gets rounded in `node_update_basis` -- so subpixel precision is lost there, see [1]]), this can lead to slight imprecisions/noise/jitter during transform (if we use float offsets, see the PR for more info).
So to counter this, use rounded offsets now [which will keep the whole circle stable].
NOTE: PR #106301 would fix this already for having the cursor still, but this patch still improves slight jitter when moving, so will commit separately.
[1] comment from `node_update_basis`
> /* Round the node origin because text contents are always pixel-aligned. */
Pull Request: https://projects.blender.org/blender/blender/pulls/106096
2a6f177e8e