Make nav slightly wider.

Author: aomarks

iron-component-page.html

@@ -27,6 +27,10 @@
 <dom-module id="iron-component-page">
   <template>
     <style include="iron-doc-default-theme">
+      :host {
+        --app-drawer-width: 300px;
+      }
+
       [hidden] {
         display: none;
       }