We have removed the default values for the columns completly, as it were only needed on SQLite when adding the column to existing row.
As this was done in an earlier migration, we can now safely remove it.
The MySQL now correctly detects no more changes. SQLite however still generates some wrong migration changes.
For example the lastModified timestamp of a part is now updated, when the user changes a price information. This should represent more what a user expects under a last Modified field and should improve also sorting...
