When loading snapshots, webconf's MIDI options doesn't reflect UI state

[riban-bw]

Describe the bug Loading snapshot "FluidR3 GM" adds 15 chains of Fluidsynth. Attempts to add a 16th chain fail.

To Reproduce Steps to reproduce the behaviour:

1. Load snapshot "FluidR3 GM"
2. Add another chain

Expected behaviour Can add another chain.

Actual behaviour No MIDI channels available to add chain.

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
• SYSTEM Raspbian GNU/Linux 10 (buster) Build Date: 2022-10-28 Memory: 15% (297M/1872M) SD Card: 40% (12G/29G) Temperature: 54.5ºC Overclock: Medium
• MIDI Profile: default.sh Tuning: 440 Hz Receive Mode: Stage (Omni On) ZS3 Sub-SnapShots: On MIDI to Output: Off Master Channel: off
• SOFTWARE zyncoder: staging-2210 (98c3df2) zynthian-ui: staging-2210 (62051e5) zynthian-sys: staging-2210 (8c7e2ac) zynthian-data: staging-2210 (3bbc39c) zynthian-webconf: staging-2210 (b60b529)

Additional context Is this related to master channel? Master channel is shown as disabled in webconf.

[riban-bw]

It looks like master channel is configured within the snapshot but is not updating webconf.

[jofemodo]

Your are right. This is an old issue and it should be solved ASAP. When loading a snapshot, included MIDI options are not reflected in webconf, that shows the selected MIDI profile (on disk!) instead of showing the "currently-loaded MIDI options". Currently we don't have a mechanism for getting the "currently loaded MIDI options" and it should be implemented.