Changes
- Move ApplicationSettings to PrinterSettings readonly static
- Add Resolver to SliceSettingsData
- Move Resolvers from EngineMapping to PrinterSettings
- Move macro replacements from Printer to PrinterSettings
- Change macro replacements to token definitions only
- Change EngineMapping to define Exports with optional conversion
Better suppression of multiple M114 commands
Don't send G90 if it has already been sent
issue: MatterHackers/MCCentral#5227
Can't unload T1
issue: MatterHackers/MCCentral#5219
'Unload filament' extrudes filament indefinitely.
Fixed a bug with timing of injecting regex replacements
moved T (extruder) tracking to queued command stream
check that we have loaded filament on extruder 1
issue: MatterHackers/MCCentral#5029
Don't do actual switch of extruders until there is a pending move command