ConsoleMonitor: Refactoring.
ConsoleMonitor: Refactoring.

Update issue 1220
Status: Started
Started the work by extracting MonitorMarker class from CommandLineWriter.
This refactoring should have definitely been done as part of issue 1066.

fiuba08/robotframework,fiuba08/robotframework,ldtri0209/robotframework,ldtri0209/robotframework,ldtri0209/robotframework,fiuba08/robotframework,waldenner/robotframework,fiuba08/robotframework,fiuba08/robotframework,waldenner/robotframework,ldtri0209/robotframework,ldtri0209/robotframework,waldenner/robotframework,waldenner/robotframework,waldenner/robotframework