Version 3.2.0-b4

Compatible files:

• RepRapFirmware 3.2.0-b4
• DuetWebControl 3.2.0-b4

Changed behaviour:

• DCS service is now started via sysinit.target instead of basic.target so that config.g is processed faster on boot
• Thumbnails from PrusaSlicer are now parsed (thanks Sindarius)
• M500 writes new heater tuning parameters to config-override.g
• In Marlin emulation "ok" responses are only sent when the line is complete

Bug fixes:

• Codes could be sent to code interceptors in the wrong order
• M21 (P0) returned an error message breaking Octoprint support
• Under certain circumstances some object model keys were not updated on initialisation
• DCS service didn't have permission to change the datetime
• Print times with decimal places were incorrectly parsed
• When the controller was reset or updated, an extra data transfer was performed