made text cursor instantly visible

thanks, @DarDoro for reporting this!

morphic.js

@@ -8,7 +8,7 @@
     written by Jens Mönig
     [email protected]
 
-    Copyright (C) 2010-2020 by Jens Mönig
+    Copyright (C) 2010-2021 by Jens Mönig
 
     This file is part of Snap!.
 
@@ -1280,7 +1280,7 @@
 
 /*global window, HTMLCanvasElement, FileReader, Audio, FileList, Map*/
 
-var morphicVersion = '2020-December-02';
+var morphicVersion = '2021-January-30';
 var modules = {}; // keep track of additional loaded modules
 var useBlurredShadows = true;
 
@@ -12589,6 +12589,7 @@ WorldMorph.prototype.edit = function (aStringOrTextMorph) {
     this.cursor = new CursorMorph(aStringOrTextMorph, this.keyboardHandler);
     this.keyboardFocus = this.cursor;
     aStringOrTextMorph.parent.add(this.cursor);
+    this.cursor.rerender();
     if (MorphicPreferences.useSliderForInput) {
         if (!aStringOrTextMorph.parentThatIsA(MenuMorph)) {
             this.slide(aStringOrTextMorph);