show 'active filters' checbox, active filters header only when needed. closes #40

src/main/webapp/WEB-INF/jsp/base/navigation.jsp

@@ -6,11 +6,10 @@
         <form class="tg search -header" action="/search">
           <fieldset class="tg search_fake-input">
             <div class="tg search_filter">
-<!--              #set ($filterParam = $request.getParameter('filter'))
-              #if ( $filterParam )
+              <c:if test="${filter.size() > 0}">
                 <input class="tg search_checkbox" id="search-filters-active" type="checkbox" checked>
-                <label for="search-filters-active">#language('filters-active')</label>
-              #end -->
+                <label for="search-filters-active">${i18n['filters-active']}</label>
+              </c:if>
             </div>
 
             <div class="tg search_search">

src/main/webapp/WEB-INF/jsp/search.jsp

@@ -42,6 +42,7 @@
 
     <h2 class="tgrep sidebar_heading">${i18n['filter']}</h2>
 
+    <c:if test="${filter.size() > 0}">
 	    <section class="tgrep sidebar_panel">
 	      <h3 class="tgrep sidebar_subheading">${i18n['active-filters']}</h3>
 	        <ul class="tgrep sidebar_list">
@@ -61,6 +62,7 @@
 	          <button class="tgrep sidebar_expand">${i18n['expand']}</button>
 	        </c:if>
 	    </section>
+    </c:if>
 
     <c:forEach items="${facets}" var="facetGroup">
       <c:if test="${facetGroup.facet.size() != 0}">