G17, G18 and G19
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While Duet3D always works in XY plane, it would be great if it would accept G17, G18 and G19. As far as I can see G17 would be just a "no operation" with G18 and G19 stopping with errors, but with more descriptive messages (something like "work in plane YZ is not supported!"). Normally CAM tools generate these GCodes especially to insure proper controller functionality. Instructing the CAM tool not to issue them may cause really hard to track errors (think of a complex part, with many machining operations, and modifying by mistake the work plane for just one of them).
