Index: lams_central/web/ckeditor/README.md
===================================================================
diff -u -r47878417b86a5be6d98fe3c2323d6c6a8121c54a -rcfec5d4c0ffe681e5e2604dc1163b309974e21f0
--- lams_central/web/ckeditor/README.md	(.../README.md)	(revision 47878417b86a5be6d98fe3c2323d6c6a8121c54a)
+++ lams_central/web/ckeditor/README.md	(.../README.md)	(revision cfec5d4c0ffe681e5e2604dc1163b309974e21f0)
@@ -298,4 +298,18 @@
 ```
 a.changeAttr("aria-label",c);c&&a.changeAttr("title",c)
 ```
-(As in [https://code.lamsfoundation.org/fisheye/changelog/lams-github?cs=4f3c21320d4784bc94f86b946f1fd304ce442b01](https://code.lamsfoundation.org/fisheye/changelog/lams-github?cs=4f3c21320d4784bc94f86b946f1fd304ce442b01))
\ No newline at end of file
+(As in [https://code.lamsfoundation.org/fisheye/changelog/lams-github?cs=4f3c21320d4784bc94f86b946f1fd304ce442b01](https://code.lamsfoundation.org/fisheye/changelog/lams-github?cs=4f3c21320d4784bc94f86b946f1fd304ce442b01))
+
+- Fix error when editing image properties and there are no classes set  
+The error in JS console: "Failed to execute 'add' on 'DOMTokenList': The token provided must not be empty."  
+In ckeditor.js change
+
+```
+type:CKEDITOR.NODE_ELEMENT,addClass:g?function(a){this.$.classList.(a);return this}
+```
+to
+
+```
+type:CKEDITOR.NODE_ELEMENT,addClass:g?function(a){if(a)this.$.classList.(a);return this}
+```
+(As in [https://code.lamsfoundation.org/fisheye/changelog/lams-github?cs=eeda79bdd48109a22afef04c841d99ec832f9a72](https://code.lamsfoundation.org/fisheye/changelog/lams-github?cs=eeda79bdd48109a22afef04c841d99ec832f9a72))  
\ No newline at end of file
Index: lams_central/web/ckeditor/ckeditor.js
===================================================================
diff -u -r47878417b86a5be6d98fe3c2323d6c6a8121c54a -rcfec5d4c0ffe681e5e2604dc1163b309974e21f0
--- lams_central/web/ckeditor/ckeditor.js	(.../ckeditor.js)	(revision 47878417b86a5be6d98fe3c2323d6c6a8121c54a)
+++ lams_central/web/ckeditor/ckeditor.js	(.../ckeditor.js)	(revision cfec5d4c0ffe681e5e2604dc1163b309974e21f0)
@@ -96,7 +96,7 @@
 CKEDITOR.dom.element.setMarker=function(a,d,b,c){var g=d.getCustomData("list_marker_id")||d.setCustomData("list_marker_id",CKEDITOR.tools.getNextNumber()).getCustomData("list_marker_id"),f=d.getCustomData("list_marker_names")||d.setCustomData("list_marker_names",{}).getCustomData("list_marker_names");a[g]=d;f[b]=1;return d.setCustomData(b,c)};CKEDITOR.dom.element.clearAllMarkers=function(a){for(var d in a)CKEDITOR.dom.element.clearMarkers(a,a[d],1)};
 CKEDITOR.dom.element.clearMarkers=function(a,d,b){var c=d.getCustomData("list_marker_names"),g=d.getCustomData("list_marker_id"),f;for(f in c)d.removeCustomData(f);d.removeCustomData("list_marker_names");b&&(d.removeCustomData("list_marker_id"),delete a[g])};
 (function(){function a(a,b){return-1<(" "+a+" ").replace(f," ").indexOf(" "+b+" ")}function d(a){var b=!0;a.$.id||(a.$.id="cke_tmp_"+CKEDITOR.tools.getNextNumber(),b=!1);return function(){b||a.removeAttribute("id")}}function b(a,b){var c=CKEDITOR.tools.escapeCss(a.$.id);return"#"+c+" "+b.split(/,\s*/).join(", #"+c+" ")}function c(a){for(var b=0,c=0,e=l[a].length;c<e;c++)b+=parseFloat(this.getComputedStyle(l[a][c])||0,10)||0;return b}var g=document.createElement("_").classList,g="undefined"!==typeof g&&
-null!==String(g.add).match(/\[Native code\]/gi),f=/[\n\t\r]/g;CKEDITOR.tools.extend(CKEDITOR.dom.element.prototype,{type:CKEDITOR.NODE_ELEMENT,addClass:g?function(a){this.$.classList.add(a);return this}:function(b){var c=this.$.className;c&&(a(c,b)||(c+=" "+b));this.$.className=c||b;return this},removeClass:g?function(a){var b=this.$;b.classList.remove(a);b.className||b.removeAttribute("class");return this}:function(b){var c=this.getAttribute("class");c&&a(c,b)&&((c=c.replace(new RegExp("(?:^|\\s+)"+
+null!==String(g.add).match(/\[Native code\]/gi),f=/[\n\t\r]/g;CKEDITOR.tools.extend(CKEDITOR.dom.element.prototype,{type:CKEDITOR.NODE_ELEMENT,addClass:g?function(a){if(a)this.$.classList.add(a);return this}:function(b){var c=this.$.className;c&&(a(c,b)||(c+=" "+b));this.$.className=c||b;return this},removeClass:g?function(a){var b=this.$;b.classList.remove(a);b.className||b.removeAttribute("class");return this}:function(b){var c=this.getAttribute("class");c&&a(c,b)&&((c=c.replace(new RegExp("(?:^|\\s+)"+
 b+"(?\x3d\\s|$)"),"").replace(/^\s+/,""))?this.setAttribute("class",c):this.removeAttribute("class"));return this},hasClass:function(b){return a(this.$.className,b)},append:function(a,b){"string"==typeof a&&(a=this.getDocument().createElement(a));b?this.$.insertBefore(a.$,this.$.firstChild):this.$.appendChild(a.$);return a},appendHtml:function(a){if(this.$.childNodes.length){var b=new CKEDITOR.dom.element("div",this.getDocument());b.setHtml(a);b.moveChildren(this)}else this.setHtml(a)},appendText:function(a){null!=
 this.$.text&&CKEDITOR.env.ie&&9>CKEDITOR.env.version?this.$.text+=a:this.append(new CKEDITOR.dom.text(a))},appendBogus:function(a){if(a||CKEDITOR.env.needsBrFiller){for(a=this.getLast();a&&a.type==CKEDITOR.NODE_TEXT&&!CKEDITOR.tools.rtrim(a.getText());)a=a.getPrevious();a&&a.is&&a.is("br")||(a=this.getDocument().createElement("br"),CKEDITOR.env.gecko&&a.setAttribute("type","_moz"),this.append(a))}},breakParent:function(a,b){var c=new CKEDITOR.dom.range(this.getDocument());c.setStartAfter(this);c.setEndAfter(a);
 var e=c.extractContents(!1,b||!1),d;c.insertNode(this.remove());if(CKEDITOR.env.ie&&!CKEDITOR.env.edge){for(c=new CKEDITOR.dom.element("div");d=e.getFirst();)d.$.style.backgroundColor&&(d.$.style.backgroundColor=d.$.style.backgroundColor),c.append(d);c.insertAfter(this);c.remove(!0)}else e.insertAfterNode(this)},contains:document.compareDocumentPosition?function(a){return!!(this.$.compareDocumentPosition(a.$)&16)}:function(a){var b=this.$;return a.type!=CKEDITOR.NODE_ELEMENT?b.contains(a.getParent().$):