v1.6.0-beta.4

• [Fixed] Removed rollback feature when exception occurs. The database still gets backed up before any modifications happen.
• [Fixed] Fix section errors when hasUrls is false.
• [Fixed] Fix missing output list after import if something goes wrong.
• [Fixed] Fix SuperTable export if width is undefined.
• [Fixed] Add Field Layout handle testing to Neo field export.
• [Fixed] Fix content model export converting string values into numbers.
• [Fixed] Fix parseFieldSources looping over string values.