Improve MIDI device listing & selection

[AW1534]

This PR aims to bring midi device listing to be on par with other apps. I mainly compared it to musescore.

Dummy devices like "System:Announce" are gone, and the names of MIDI devices are friendlier now. Note that the longer names are still used by the system and stored in config, but the "friendly names" are only displayed to the user.

Another thing this PR does (since 359b58c) is improve the persistence of MIDI devices with midiautoassign. Essentially, the client ID of a device can change on restart, which makes LMMS recognise it as a seperate device- this PR fixes that.

Previously, the code checked if the client id, port id, client name and port name all match. Now, if all 4 don't match, it checks if the port id, client name and port name match. While there is technically the ability for the wrong device to be selected because of this, it's better than no device being selected, and the user having to reselect it. if (in some edge case) the wrong device is selected because of this, but the correct device is reconnected, it should automatically go back to the correct device. This is very wordy to explain, but it really is a simple change.

Edit: it appears my changes in 359b58c are linux only, and the code won't compile on anything else. so im drafting this for now.

Before:
input:

output:

auto assign midi:

After:
input:

output:

auto assign midi:

Musescore for comparison: