Cannot change presets with assigned midi controller knob

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### System Information

Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz

### LMMS Version(s)

Version 1.3.0-alpha.1.743+gb21a2696a (win32/x86_64, Qt 5.15.6, GCC 9.3-posix 20200320).

### Most Recent Working Version

_No response_

### Bug Summary

Hi, I can assign a midi controller knob to preset next and previous but it does not work. When I press the key, I do see the preset selection button is highlichted/selected but it does not change to next or previous preset.


### Expected Behaviour

Every time I press an assigned knob, the next or previous preset should be selected.

### Steps To Reproduce

Richtclick preset selection knop forward or backwards. Connect to controller. Midi controller. Click on the hardware knob and it;s controller code will be assigned.

### Logs

Click to expand

### Screenshots / Minimum Reproducible Project

_No response_

### Please search the issue tracker for existing bug reports before submitting your own.

- [x] I have searched all existing issues and confirmed that this is not a duplicate.

Reproduce the issue in LMMS 1.3.0-alpha.1.743 using an assigned MIDI controller on the preset forward and backward controls. Start by tracing the MIDI controller handling for preset selection and compare the highlighted-button behavior with actual preset changes. Done means both assigned controls select the next or previous preset reliably, with a regression test if the existing test structure supports it.

Written by the indexing model from the issue text.