There has already been some work on the placement/size of the text
displayed by the Edit Voxel Size operator (see b65ab29310 &
0c98bb75cb), so it already sets up a suiting matrix in
`VoxelSizeEditCustomData` > `text_mat`. This includes having called
`ED_view3d_pixel_size` and this takes into account the UI resolution
scale already afaict.
So in order to resolve, just remove the multiplication by UI_SCALE_FAC.
Fixes#106849
Pull Request: https://projects.blender.org/blender/blender/pulls/131093
a0c0eefd5d