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/crash-909.yml

@@ -0,0 +1,19 @@
+name: crash-909
+comment: Use range C-4 to G-4
+numvoices: 1
+units:
+    - type: envelope
+      id: 1
+      parameters: {attack: 3, decay: 83, gain: 64, release: 79, stereo: 1, sustain: 0}
+    - type: oscillator
+      id: 2
+      parameters: {color: 64, detune: 68, gain: 111, looplength: 5676, loopstart: 2615, phase: 0, samplestart: 433554, shape: 64, stereo: 1, transpose: 65, type: 4, unison: 0}
+    - type: mulp
+      id: 3
+      parameters: {stereo: 1}
+    - type: pan
+      id: 5
+      parameters: {panning: 50, stereo: 1}
+    - type: outaux
+      id: 6
+      parameters: {auxgain: 21, outgain: 70, stereo: 1}