remove imports from html so we don't have to manage them.

x-designable.html

@@ -330,6 +330,7 @@
         var template = document.createElement('template');
         template.bindingDelegate = this.syntax;
         template.innerHTML = html;
+        this.sanitizeContent(template.content);
         this.innerHTML = '';
         // make imports go...
         this.loadElementImports(template.content, function() {
@@ -340,6 +341,13 @@
           this.notify();
         }.bind(this));
       },
+      sanitizeContent: function(element) {
+        // remove imports so that we don't have to keep track of them
+        var imports = element.querySelectorAll('link[rel=import]').array();
+        imports.forEach(function(i) {
+          i.remove();
+        });
+      },
       loadElementImports: function(element, callback) {
         var pending = 1;
         var receive = function() {