#555 import from demo library (local) does not work

src/editor/extensions/ext-imagelib/index.js

@@ -1,6 +1,7 @@
 const atags = document.querySelectorAll('a');
 Array.prototype.forEach.call(atags, function (aEle) {
   aEle.addEventListener('click', function (event) {
+    event.preventDefault();
     const { href } = event.currentTarget;
     const target = window.parent;
     const post = (message) => {

src/svgcanvas/svg-exec.js

@@ -519,7 +519,7 @@ export const importSvgString = function (xmlString) {
     const batchCmd = new BatchCommand('Import Image');
     let symbol;
     if (useExisting) {
-      ({ symbol } = svgContext_.getImportIds());
+      symbol = svgContext_.getImportIds(uid).symbol;
       ts = svgContext_.getImportIds(uid).xform;
     } else {
       // convert string into XML document