make double click timing diagram have pulses for events

Author: furbrain

docs/timing_double.json

@@ -3,18 +3,18 @@
   {name: 'Button',   wave: '0.1..0..1..0..1..0.', node: '..A..M..B..N..C..O..'},
   {},
   ['ANY_EVENT',
-    {name: 'PRESSED',  wave: '0.10....10....10...', node: '..D.....E.....F.....',
+    {name: 'PRESSED',  wave: '0.pl....pl....pl...', node: '..D.....E.....F.....',
       phase: -0.25
     },
-    {name: 'RELEASED', wave: '0....10....10....10', node: '.....G.....H.....I..',
+    {name: 'RELEASED', wave: '0....pl....pl....pl', node: '.....G.....H.....I..',
       phase: -0.25
     },
     {},
    ['ALL_CLICKS',
-      {name: 'SINGLE',   wave: '0....10..........10', node: '.....J...........L..',
+      {name: 'SINGLE',   wave: '0....pl..........pl', node: '.....J...........L..',
       phase: -0.25
     },
-      {name: 'DOUBLE',   wave: '0..........10......', node: '...........K........',
+      {name: 'DOUBLE',   wave: '0..........pl......', node: '...........K........',
       phase: -0.25
     },
       {name: 'TRIPLE',   wave: '0..................', node: '....................',