Improve PADD version comparison

[yubiuser]

• What does this PR aim to accomplish?:

Improve the version comparison of the PADD versions. So far, we literally compare ${padd_version} with ${padd_version_latest} and if they differ, we assume PADD is out of date.
This PR does a conversion of the version string from v.X.Y.Z to X00Y00Z000 and really checks if ${padd_version} is less than ${padd_version_latest}.
This has also the advantage that newer, local PADD versions (e.g. pre-release versions) do not trigger the "PADD is out of date" warning.

Example: Current (remote) PADD version is v3.7.1. Local version is v3.8.0

---

By submitting this pull request, I confirm the following:

1. I have read and understood the contributors guide, as well as this entire template. I understand which branch to base my commits and Pull Requests against.
2. I have commented my proposed changes within the code and I have tested my changes.
3. I am willing to help maintain this change if there are issues with it later.
4. It is compatible with the EUPL 1.2 license
5. I have squashed any insignificant commits. (git rebase)

---

• I have read the above and my PR is ready for review. Check this box to confirm

[yubiuser]

Ok, stickler is failing as well...