feat!: display the parameters as knobs in a grid

Also removed the negbandpass & neghighpass parameters
and replaced them with bandpass & highpass set to -1, to
fit the switches better to the GUI.

Closes #51, closes #173

tracker/presets/DR/kick test

@@ -1,39 +0,0 @@
-name: Instr
-numvoices: 1
-units:
-    - type: oscillator
-      id: 2
-      parameters: {color: 0, detune: 64, gain: 128, lfo: 1, phase: 0, shape: 48, stereo: 0, transpose: 76, type: 1, unison: 0}
-    - type: send
-      id: 21
-      parameters: {amount: 78, port: 0, sendpop: 0, stereo: 0, target: 12, unit: 0, voice: 0}
-    - type: send
-      id: 22
-      parameters: {amount: 86, port: 4, sendpop: 1, stereo: 0, target: 12, unit: 0, voice: 0}
-    - type: envelope
-      id: 1
-      parameters: {attack: 8, decay: 73, gain: 64, release: 0, stereo: 0, sustain: 0}
-    - type: oscillator
-      id: 12
-      parameters: {color: 128, detune: 62, gain: 128, phase: 0, shape: 60, stereo: 0, transpose: 46, type: 0, unison: 0}
-    - type: mulp
-      id: 14
-      parameters: {stereo: 0}
-    - type: envelope
-      id: 18
-      parameters: {attack: 64, decay: 64, gain: 64, release: 64, stereo: 0, sustain: 64}
-    - type: noise
-      id: 20
-      parameters: {gain: 64, shape: 64, stereo: 0}
-    - type: mulp
-      id: 19
-      parameters: {stereo: 0}
-    - type: addp
-      id: 23
-      parameters: {stereo: 0}
-    - type: pan
-      id: 5
-      parameters: {panning: 64, stereo: 0}
-    - type: outaux
-      id: 6
-      parameters: {auxgain: 0, outgain: 64, stereo: 1}