midi_to_cv: improve grounding planes

the original signal grounding through a 100R resisitor doesn't work when
powering the le-potato SBC through the IDC connector. Removed the
resistor connection, and added some vias between the 2 ground planes.

midi_to_cv_daughter_board/midi_to_cv_daughter_board.kicad_pro

@@ -543,7 +543,7 @@
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       "sort_order": 0
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-    "bom_export_filename": "",
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     "bom_fmt_settings": {
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@@ -593,12 +593,24 @@
           "label": "DNP",
           "name": "${DNP}",
           "show": true
+        },
+        {
+          "group_by": false,
+          "label": "#",
+          "name": "${ITEM_NUMBER}",
+          "show": false
+        },
+        {
+          "group_by": false,
+          "label": "Description",
+          "name": "Description",
+          "show": false
         }
       ],
       "filter_string": "",
       "group_symbols": true,
       "include_excluded_from_bom": false,
-      "name": "Grouped By Value",
+      "name": "",
       "sort_asc": true,
       "sort_field": "Reference"
     },

midi_to_cv_daughter_board/midi_to_cv_daughter_board.kicad_sch

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@@ -5303,6 +5353,30 @@
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+		(shape input)
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+		(effects
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 		(shape input)
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@@ -5567,6 +5641,30 @@
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+		(effects
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 	(global_label "GPIO_PIN_11"
 		(shape input)
 		(at 222.25 125.73 180)
@@ -5735,6 +5833,30 @@
 			)
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+	(global_label "Digital GND"
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 		(shape input)
 		(at 35.56 152.4 180)
@@ -6095,6 +6217,30 @@
 			)
 		)
 	)
+	(global_label "Digital GND"
+		(shape input)
+		(at 35.56 149.86 180)
+		(fields_autoplaced yes)
+		(effects
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 		(shape input)
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@@ -6311,6 +6457,30 @@
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@@ -6431,6 +6601,30 @@
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@@ -8001,88 +8195,6 @@
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-		(lib_id "Device:R")
-		(at 59.69 80.01 0)
-		(unit 1)
-		(body_style 1)
-		(exclude_from_sim no)
-		(in_bom yes)
-		(on_board yes)
-		(in_pos_files yes)
-		(dnp no)
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