(search) Retain filter options when performing a new search from the input field

code/services-application/search-service/src/main/java/nu/marginalia/search/model/DecoratedSearchResults.java

@@ -27,4 +27,5 @@ public class DecoratedSearchResults {
     public String getJs() {
         return params.js().value;
     }
+    public String getAdtech() { return params.adtech().value; }
 }

code/services-application/search-service/src/main/resources/templates/search/parts/search-form.hdb

@@ -7,6 +7,11 @@
             </button>
         </h1>
         <input type="text" name="query" placeholder="Search..." value="{{query}}" autocomplete="off">
+
+        <input type="hidden" name="js" value="{{js}}">
+        <input type="hidden" name="adtech" value="{{adtech}}">
+        <input type="hidden" name="profile" value="{{profile}}">
+
         <button type="submit">Search</button>
     </div>
 </form>