Specify DirectConnection for a few plugins

[Firepal]

Fixes #5665.
Continues #4942. (somewhat, at least)

(If i understand this problem right,) some knob connections were automatically set to QueuedConnection, which made them update poorly and thus caused audible "snapping" with knob values in knobs that were automated. Manually setting those connections to DirectConnection fixes that.

The following plugins were changed:

• TripleOscillator
• BitInvader
• AudioFileProcessor
• Monstro
• Nescaline (haven't tested these last two, but for good measure...)

[LmmsBot]

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Linux

• Linux (AppImage): lmms-1.2.3-722%2Bg08a4def-linux-x86_64.AppImage (build link)

Windows

• Windows 32-bit: lmms-1.2.3-722%2Bg08a4def3e-mingw-win32.exe (build link)
• Windows 64-bit: lmms-1.2.3-722%2Bg08a4def3e-mingw-win64.exe (build link)
• Windows 32-bit: lmms-1.2.2-msvc2017-win32.exe (build link)
• Windows 64-bit: lmms-1.2.2-msvc2017-win64.exe (build link)

macOS

• macOS : lmms-1.2.3-722%2Bg08a4def3e-mac10.13.dmg (build link)

🤖

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[Firepal]

Did it for Nescaline detuning knobs at the last minute. Haven't tested, but looks safe. I won't commit any more changes, you can merge if you want.

[DomClark]

Looks good to me. You could also make the volume and pan connections for TripleOscillator direct (just above the other changes in that file).

[Firepal]

Shoot. Didn't see those, good eye

[DomClark]

This can be merged now - I will do so tomorrow if there are no objections.