Improve void elements for xml parser

src/dom_components/config/config.js

@@ -35,7 +35,8 @@ export default {
    */
   processor: 0,
 
-  // List of void elements
+  // List of HTML void elements
+  // https://www.w3.org/TR/2011/WD-html-markup-20110113/syntax.html#void-elements
   voidElements: [
     'area',
     'base',

src/parser/model/ParserHtml.js

@@ -232,6 +232,11 @@ export default config => {
           }
         }
 
+        // Check for custom void elements (valid in XML)
+        if (!nodeChild && `${node.outerHTML}`.slice(-2) === '/>') {
+          model.void = true;
+        }
+
         // If all children are texts and there is some textnode the parent should
         // be text too otherwise I'm unable to edit texnodes
         const comps = model.components;