increased size of Select a Feature panel

so you don't have to scroll

Author: r12a

index.html

@@ -78,7 +78,7 @@ <h1> Type samples</h1>
 <section id="sidebarExtras">
 <form onChange="displayRepo(getFilter())">
   <h2 class="notoc">Select a feature</h2>
-  <select id="features" size="10">
+  <select id="features" size="18">
     <option value="abbreviation" type="radio" name="filter">Abbreviation</option>
     <option value="bidi-text" type="radio" name="filter">Bidirectional text</option>
     <option value="emphasis" type="radio" name="filter">Emphasis</option>