fixed #1333 - paint new costume not working in retina mode in FF and Edge

gui.js

@@ -72,7 +72,7 @@ isRetinaSupported*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.gui = '2016-July-19';
+modules.gui = '2016-July-20';
 
 // Declarations
 
@@ -2982,7 +2982,7 @@ IDE_Morph.prototype.aboutSnap = function () {
         module, btn1, btn2, btn3, btn4, licenseBtn, translatorsBtn,
         world = this.world();
 
-    aboutTxt = 'Snap! 4.0.8.3\nBuild Your Own Blocks\n\n'
+    aboutTxt = 'Snap! 4.0.8.4\nBuild Your Own Blocks\n\n'
         + 'Copyright \u24B8 2016 Jens M\u00F6nig and '
         + 'Brian Harvey\n'
         + 'jens@moenig.org, bh@cs.berkeley.edu\n\n'
@@ -6923,7 +6923,7 @@ WardrobeMorph.prototype.removeCostumeAt = function (idx) {
 
 WardrobeMorph.prototype.paintNew = function () {
     var cos = new Costume(
-            newCanvas(),
+            newCanvas(null, true),
             this.sprite.newCostumeName(localize('Untitled'))
         ),
         ide = this.parentThatIsA(IDE_Morph),

history.txt

@@ -2971,7 +2971,6 @@ http://snap.berkeley.edu/run#cloud:Username=jens&ProjectName=rotation
 
 == v4.0.8.2 ====
 
-
 160719
 ------
 * Morphic: avoid blitting artifacts for non-integer devicePixelRatios in Firefox
@@ -2981,3 +2980,9 @@ http://snap.berkeley.edu/run#cloud:Username=jens&ProjectName=rotation
 
 == v4.0.8.3 ====
 
+160720
+------
+* GUI: fixed #1333 - paint a new costume not working in retina mode in FF and Edge
+
+== v4.0.8.4 ====
+