We'll offer the option to print from outside to inside, from inside to outside, or from inside to outside except that the very innermost centre wall is printed last.
Contributes to issue CURA-8109.
Things to note:
* Since there is no VersionUpgrader from 4.8 to 4.9, this versionUpgrader attempts to upgrade
files made in 4.8. This means that it touches files with setting_version = 16.
* The upgrade of the setting_version to 18 is currently commented out because we are not entirely
sure that 18 will be the setting_version in 5.0.
* This versionUpgrader removes the following three settings that were removed in libArachne
* "Compensate Wall Overlaps"
* "Compensate Outer Wall Overlaps"
* "Compensate Inner Wall Overlaps"
* The VersionUpgrader also disabled Fuzzy Skin from any profiles that may have it enabled, as fuzzy
skin currently doesn't work in libArachne.
* The printer definitions have NOT been updated to the new setting_version to avoid having to deal
with an enormous merge conflict in case the setting_version of 5.0 is something other than 18.
* Since the VersionUpgrader does not alter the setting_version, it will run every time Cura starts.
In short, this versionUpgrader runs and removes the deleted settings but it does not really change
the setting_version of any files.
Contributes to CURA-7683 and CURA-7656
