board editor code tweaks

ui/editor/src/keyboard.js

@@ -1,21 +1,10 @@
 var k = Mousetrap;
 var m = require('mithril');
 
-function preventing(f) {
-  return function(e) {
-    if (e.preventDefault) {
-      e.preventDefault();
-    } else {
-      // internet explorer
-      e.returnValue = false;
-    }
-    f();
-  };
-}
-
 module.exports = function(ctrl) {
-  k.bind('f', preventing(function() {
+  k.bind('f', function(e) {
+    e.preventDefault();
     ctrl.chessground.toggleOrientation();
     m.redraw();
-  }));
+  });
 };

ui/editor/src/view.js

@@ -254,15 +254,12 @@ function sparePieces(ctrl, color, orientation, position) {
 
 function onSelectSparePiece(ctrl, s, upEvent) {
   return function(e) {
+    e.preventDefault();
     if (['pointer', 'trash'].includes(s)) {
       ctrl.selected(s);
     } else {
       ctrl.selected('pointer');
 
-      if (e.type === 'touchstart') {
-        e.preventDefault();
-      }
-
       dragNewPiece(ctrl.chessground.state, {
         color: s[0],
         role: s[1]
@@ -292,8 +289,6 @@ function makeCursor(selected) {
   return 'url(' + url + '), default !important';
 }
 
-var eventNames = ['mousedown', 'touchstart'];
-
 module.exports = function(ctrl) {
   var fen = ctrl.computeFen();
   var color = ctrl.bottomColor();