Made most kinematics support a build config option
Made PanelDue flasher a build config option
Made SPI temperature sensors a build config option
Fixed current loop sensor in expansion board mode
Use atanf instead of atan in Hangprinter kinematics
Removed M573 support
Added experimental Mini4 build configuration
Increased version to 3.4.0rc1
Added support for num_layers detection to fileinfo requests
numLayers is reported again as part of fileinfo responses and set by SBC
Bug fix: rr_thumbnail could hang up the network task when invalid parameters were passed