Support for some non-standard $SPILLOVER fields

[fryolysis]

Is your feature request related to a problem? Please describe.
The problem is that the $SPILLOVER field in the FCS 3.0 table in the LMD file exported from a Beckman Coulter's Navios cytometer is not strictly compliant to the FCS 3.1 standard ($SPILLOVER is defined in FCS 3.1). They use channel numbers instead of $PnN labels.

Describe the solution you'd like
Handle the case (by matching the channel numbers to $PnN labels maybe) instead of throwing an error.

Additional context
Since you implemented support for some non-standard behavior before (like ignoring offset errors), you might consider implementing this one as well.

[whitews]

Hi @fryolysis,

Do you have an FCS file you can share? Preferably one that can be included publicly in this repository as part of a test case? Also do you know if this $SPILLOVER value in Navios files use this format 100% of the time?

Kind regards,
Scott

[fryolysis]

Hi @whitews,

Unfortunately the data is not public. I don't know if there is any official documentation about this, but I checked a few files and all of them have this format. I will check some more next week.

[fryolysis]

Here is their technical doc. It confirms that what I say above is correct.
https://www.beckman.com.tr/techdocs/773232AL/wsr-168067