Polytonality/Layer feature "forgets" to change minor to major chord (intended behaviour)

Subtriad layers don't respect edits that change the "Tongeschlecht" of the base chord.

Tested with Synfire Pro 3.0.6 build #1 on MacOS.

Steps to reproduce:

• Create a new arrangement - outcome: an empty arrangement is created
• Snapshot harmony - outcome: a progression consisting merely of C major chords is created
• Select first chord, change it to e minor - outcome: the progression now starts with an e minor chord
• From menu "Transform" select Layer -> Add next Subtriad - outcome: a subtriad layer starting with an e minor chord is created
• Change the first chord back to C major - outcome: the subtriad layer contains a c minor chord while the base progression contains C major.

I consider this behaviour a bug in the program logic.