v1.6.8-rc2

• Changed offset management of the texture
• Changed mlsetups export
• Minor fixes on .mlsetup import
• Manage more than one mlsetup at the time
• Ctrl+w will close ui tabs from multiple .mlsetups
• New microblends
• Contextual menu on layer material color preview
• Material composer display actual .Material.json content
• Confirm window addition and microblends retrieve