`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.