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-sample.yml

@@ -0,0 +1,24 @@
+name: kick-sample
+numvoices: 1
+units:
+    - type: envelope
+      id: 1036
+      parameters: {attack: 0, decay: 82, gain: 71, release: 0, stereo: 0, sustain: 0}
+    - type: oscillator
+      id: 1037
+      parameters: {color: 64, detune: 64, gain: 128, looplength: 1, loopstart: 1034, phase: 0, samplestart: 741926, shape: 95, stereo: 0, transpose: 78, type: 4, unison: 1}
+    - type: mulp
+      id: 1038
+      parameters: {stereo: 0}
+    - type: filter
+      id: 1042
+      parameters: {bandpass: 0, frequency: 10, highpass: -1, lowpass: 1, resonance: 57, stereo: 0}
+    - type: filter
+      id: 1043
+      parameters: {bandpass: 1, frequency: 70, highpass: -1, lowpass: 1, resonance: 23, stereo: 0}
+    - type: pan
+      id: 1040
+      parameters: {panning: 64, stereo: 0}
+    - type: outaux
+      id: 1041
+      parameters: {auxgain: 8, outgain: 69, stereo: 1}