SooperLooper does not restore replace quantize value from preset

[riban-bw]

Describe the bug
Restoring a SooperLooper preset will always assert replace quantize.

To Reproduce
Steps to reproduce the behaviour:

1. Add SooperLooper to a chain
2. Set replace quant to off
3. Save as new preset
4. Restore preset

Expected behaviour
Preset restores with replace quant off.

Actual behaviour
Preset restores with replace quant on.

Setup:

• HARDWARE
  Raspberry Pi 4 Model B Rev 1.4
  Audio: ZynADAC
  Display: ZynScreen 3.5 (v1)
  Wiring: MCP23017_ZynScreen
  I2C: MCP23017@0x20, MCP23008@0x21, ADS1115@0x48, MCP4728@0x60
• SYSTEM
  Raspbian GNU/Linux 10 (buster)
  Build Date: 2020-09-05
  Memory: 6% (126M/1872M)
  SD Card: 70% (19G/29G)
  Temperature: 61.8ºC
  Overclock: Medium
  USB Storage: 5% (9.7G/235G)
• MIDI
  Profile: default.sh
  Tuning: 440 Hz
  Receive Mode: Stage (Omni On)
  ZS3 Sub-SnapShots: On
  MIDI to Output: On
  Master Channel: 16
• SOFTWARE
  zyncoder: testing (6eb5496)
  zynthian-ui: testing (68c0485)
  zynthian-sys: testing (af606bf)
  zynthian-data: testing (45b44f9)
  zynthian-webconf: testing (706d78d)

Additional context
This seems to be an upstream issue with the value not being stored to nor restored from the session file. Reported as essej/sooperlooper#37.