Fixed ignoring initial midi setup when loading an organ with a preset without midi events configured https://github.com/GrandOrgue/grandorgue/issues/1785 #1865
Earlier: initial midi settings were not used when loading a preset .cmb file.
Now: if some element doesn't have any midi events configured in the preset, it uses the midi events from the initial midi config.
When the user saves the preset, these midi events are also saved. So if the user changes the initial midi config, it does not affect the events have already been saved to the preset.
Resolves: #1785
Earlier: initial midi settings were not used when loading a preset .cmb file. Now: if some element doesn't have any midi events configured in the preset, it uses the midi events from the initial midi config.
When the user saves the preset, these midi events are also saved. So if the user changes the initial midi config, it does not affect the events have already been saved to the preset.