StyleMaker : Multiple conditions settings

It would be nice to make working the multiple conditions settings in the stylemaker.
For example: For the bass, we have two 2-beat patterns with following settings (plus other 2-beat patterns with different settings):
Pattern#1
Relative weight=9
Playback bar mask = fill
Playback beat mask=beat1

Pattern#2
Relative weight=9
Playback bar mask = fill
Playback beat mask=beat3.
This configuration is required for example to get a given bass line during a fill bar and when there is a chord change during the fill bar.

When you hit play, at the fill bar, the pattern#1 would be played first, and then the pattern#2 starting at beat3. In fact, we could get any combination of patterns, including all other 2-beat patterns present in the style. So, the required bass fill riff is not guaranteed.

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