[turbolizer] Allow selecting inputs also with numeric keyboard.

tools/turbolizer/graph-view.js

Index: tools/turbolizer/graph-view.js
diff --git a/tools/turbolizer/graph-view.js b/tools/turbolizer/graph-view.js
index 1c732d069565dbc6cbac7b5a6bcf0abd2a671216..5c802e1b56fd1ef355b13dec939e3eef895a1857 100644
--- a/tools/turbolizer/graph-view.js
+++ b/tools/turbolizer/graph-view.js
@@ -583,6 +583,20 @@ class GraphView extends View {
           (edge, index) => { return index == (d3.event.keyCode - 49); },
           false);
       break;
+    case 97:
+    case 98:
+    case 99:
+    case 100:
+    case 101:
+    case 102:
+    case 103:
+    case 104:
+    case 105:
+      // 'numpad 1'-'numpad 9'
+      showSelectionFrontierNodes(true,
+          (edge, index) => { return index == (d3.event.keyCode - 97); },
+          false);
+      break;
     case 67:
       // 'c'
       showSelectionFrontierNodes(true,