Check existence of _context object on gd

Author: Tom Aerts

src/components/dragelement/index.js

@@ -82,7 +82,7 @@ dragElement.unhoverRaw = unhover.raw;
 dragElement.init = function init(options) {
     var gd = options.gd;
     var numClicks = 1;
-    var DBLCLICKDELAY = gd._context.doubleClickDelay ? gd._context.doubleClickDelay : interactConstants.DBLCLICKDELAY;
+    var DBLCLICKDELAY = (gd._context && gd._context.doubleClickDelay) ? gd._context.doubleClickDelay : interactConstants.DBLCLICKDELAY;
     var element = options.element;
 
     var startX,

src/components/legend/draw.js

@@ -36,7 +36,7 @@ var DBLCLICKDELAY = interactConstants.DBLCLICKDELAY;
 module.exports = function draw(gd) {
     var fullLayout = gd._fullLayout;
     var clipId = 'legend' + fullLayout._uid;
-    DBLCLICKDELAY = gd._context.doubleClickDelay ? gd._context.doubleClickDelay : DBLCLICKDELAY;
+    DBLCLICKDELAY = (gd._context && gd._context.doubleClickDelay) ? gd._context.doubleClickDelay : DBLCLICKDELAY;
 
     if(!fullLayout._infolayer || !gd.calcdata) return;