Pasting numerical array buttons happens with `Ctrl + Alt + V`.
Holding `Alt` also triggers uiSelectContext, so having other nodes/
objects etc. selected while doing this would try to copy the pasted
values back to other objects (possibly to the ones you pasted from) and
that happens relative to the original value, so the value actually
changes.
NOTE: the `Ctrl + Alt + V` shortcut can also be used on non-array buttons, so was an issue for them as well.
To prevent the "copy-to-selected" behavior, refine the `IS_ALLSELECT_EVENT` macro to be more specific.
Pull Request: https://projects.blender.org/blender/blender/pulls/108270
c51467cd4c