#83 jquery convert to pure javascript changes (#84)

src/editor/extensions/ext-foreignobject/ext-foreignobject.js

@@ -7,7 +7,6 @@
  * @copyright 2010 Jacques Distler, 2010 Alexis Deveria
  *
  */
-
 const loadExtensionTranslation = async function (lang) {
   let translationModule;
   try {
@@ -26,6 +25,7 @@ export default {
     const svgEditor = this;
     const {$, text2xml, NS} = S;
     const {svgCanvas} = svgEditor;
+    const {$id} = svgCanvas;
     const
       // {svgcontent} = S,
       // addElem = svgCanvas.addSVGElementFromJson,
@@ -183,10 +183,10 @@ export default {
         return Object.assign(contextTools[i], contextTool);
       }),
       callback () {
-        $('#foreignObject_panel').hide();
+        $id("foreignObject_panel").style.display = 'none';
 
         const endChanges = function () {
-          $('#svg_source_editor').hide();
+          $id("svg_source_editor").style.display = 'none';
           editingforeign = false;
           $('#svg_source_textarea').blur();
           toggleSourceButtons(false);