`PREFERENCES_OT_copy_prev` handling of versionning was for older release
cycles type (pre-3.0), now that we are in 4.0, we can use a simpler
logic: Just look for startup data from this major release cycle (i.e.
4.x currently) and the previous one (i.e. all 3.x releases).
Fixes the 're-use previous settings' option not showing when first
starting 4.0 build.
086dada878