German Translation Update

I made a little improvement after looking at the recent changes to the dutch translation.
Catch SQLiteException (support info)
Merge pull request #1533 from Phylon/patch-1

German Translation Update
Updated changelog
Updated upgrading section
Better default check boxes

Refs #1531
Polish translation updated
Merge pull request #1535 from skibbipl/patch-34

Updated Polish translation
Updated changelog
German and French translations:  format strings migrated to positional format
Merge pull request #1536 from Phylon/patch-2

German and French translations:  format strings migrated to positional format
Updated changelog
Layout fix

Closes #1537