Recording emulator not showing colors

[mstancl]

Hi,

I've noticed that the dm3270 repository has support of colors for different fields (protected/unprotected,intesfied etc),
yet the emulator in JMeter does not show them.

Going through the source, I've noticed that the RTERecorder is initializing a 5250Emulator, which I believe, does not support the colors and hence are omitted.

Is this expected? Is there a way how to enable the colors?
If not, I would consider doing a pull request to enable.

Thank you very much!