Luanti commit e037873 changed how the tool range and caps are taken into account.
Hence, skin hands now overwrite the long-range hand (`""`) provided by the creative mod.
We want to preserve the tool range and capabilities, thus this commit.
i.e. the formspec v4 rewrite
Requires UI "version-2" tag or commit a7556c50 or later and
and Minetest v5.4.0 or later
This also makes it work properly in UI's "lite" mode.
