* 'master' of github.com:ultimaker/Cura: (76 commits)
Added UMO upgrade selection
Added stubs for UMO upgrade selection
Machine action labels are now translatable
Code style CURA-1676
Using the correct placeholder
SplashScreen: Using system-default fontfamily
USBPrinting: Let's "Print via USB"
BQ Hephestos2 - Preheating temperature fix When starting a print with the "custom" GCode by BQ, the printer resets the nozzle temperature to 210°C when printing via SD card (no matter what you set on Cura) and only preheats the nozzle to 180°C when printing via USB. So currently the printer begins to print via USB at 180°C and reaches the correct temperature eg.g while printing the brim.
Fix warning about missing color in theme
Automatically show the Print Monitor when starting a print
Fix USBPrinterOutputDevice to work with the Print Monitor
Properly prevent warning when no printer is connected.
ZOffset decorator is now correctly copied
Force focus instead of requesting it.
Fix two "critical errors" on startup
Minor check machine action GUI improvements
Prevent warning when no printer is connected.
Fix empty material/quality profiles when switching variants
Disable monitor buttons when there is no job running
Move message stack "above" the viewport overlay
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