Prevent removal of last input fields.

Add:
    static/js/index.advanced-search-form.js
        -Prevent the user from removing the last input field in an
        advanced-search group.

Rem:
    templates/index.html
        -Remove vestige code accidentally preserved during the c6e5b4f merge.

static/js/index.advanced-search-form.js

@@ -67,7 +67,7 @@ var searchGroups = $("div#search-groups");
         })
     });
 
-    // Add an input field to the currently selected search group.
+    // Toggle the presence of an input field.
     $("div#sidebar input[type=checkbox]").click(function(){
         var fieldId = $(this).prop("id");
         if($(this).is(":checked")){
@@ -76,8 +76,12 @@ var searchGroups = $("div#search-groups");
             if(fieldId.slice(0, 4) == "date")
                 $(".search-group#selected ." + fieldId).datepicker();
         }
-        else
-            $("div.search-group#selected #" + fieldId).remove()
+        else {
+            if($(".search-group#selected").children("div").length > 1)
+                $(".search-group#selected #" + fieldId).remove()
+            else
+                $(this).prop("checked", true);
+        }
     });
 
     var previousAdvancedQuery = "";
@@ -140,8 +144,5 @@ function assembleQuery(){
 function genFieldQueryString(field, hasRegex){
     var terms = field.value.replace(/\\/g, "\\\\").replace(/\"/g, "\\\"");
     var query = field.getAttribute("name") + ":" + (hasRegex?"re:":"") + terms;
-    if(field.value.indexOf('"') >= 0){
-        return '"' + query + '"';
-    }
-    return query;
+    return '"' + query + '"';
 }

templates/index.html

@@ -89,31 +89,6 @@
               <span class="regex">Regex</span>
             </div>
           </div>
-
-          <div id="lower-half">
-            <ul>
-              <li>
-                <label for="symbols">Symbols</label>
-                <input type="text" name="symbols" id="symbols"><br>
-              </li>
-
-              <li>
-                <label for="functions">Functions</label>
-                <input type="text" name="functions" id="functions"><br>
-              </li>
-
-              <li>
-                <label for="classes">Classes</label>
-                <input type="text" name="classes" id="classes"><br>
-              </li>
-
-              <li>
-                <label for="variables">Variables</label>
-                <input type="text" name="variables" id="variables"><br>
-              </li>
-
-            </ul>
-          </div>
         </div>
       </div>
     </form>