refs #23451 [finc] accessibility changes to advanced_search/layout

* changed language token on remove field to a more unique text that describes the action
* extended the clear button javascript to also clear number fields and reset the sliders (apparently not even real vufind got this)
* added a contengency function for clearing of the sliders in advanced search publishDate widget

local/languages/de.ini

@@ -484,6 +484,7 @@ Related Title = "Zugehörige Werke"
 Renew Login = "Bitte, erneut einloggen"
 Remove all Filters = "entfernen Sie alle Suchfilter"
 Remove from Book Bag = "Nicht mehr merken"
+remove_adv_search_field = "Eingaben in diesem Suchfeld entfernen"
 Repeat your password = "Wiederhole das Passwort"
 Reserve = Vormerkbar
 Reserved = "Vorgemerkte Medien"

local/languages/en.ini

@@ -528,6 +528,7 @@ Recall This = "Recall this"
 Recent acquisitions = "Recent Acquisitions"
 Region = Region
 Remove all Filters = "remove all Filters"
+remove_adv_search_field = "Remove input in this search field"
 Reserves = Reserves
 Results per page = "Results per Page"
 Reviews = Reviews

themes/finc/js/advanced_search.js

@@ -160,10 +160,22 @@ deleteGroup = function _deleteGroup(group) {
 $(document).ready(function advSearchReady() {
   $('.clear-btn').click(function clearBtnClick() {
     $('input[type="text"]').val('');
+    $('input[type="number"]').val('');
     $('select').not('#limit').find('option:selected').prop("selected", false);
     if (typeof defaultLimit !== 'undefined') {
       $("#limit").val(defaultLimit);
     }
+    // Resetting Bootstrap Sliders
+    let fromValue = Number($('#publishDatefrom').val());
+    let toValue = Number($('#publishDateto').val());
+    $('#publishDateSortdateSlider').slider(
+        'setValue',
+        [
+          isNaN(fromValue) || fromValue <= 0 ? 1400 : fromValue,
+          isNaN(toValue) || toValue <= 0 ? (new Date().getFullYear() + 1) : toValue
+        ],
+        true
+    );
     $("#illustrated_-1").click();
   });
 });

themes/finc/templates/search/advanced/layout.phtml

@@ -137,8 +137,7 @@
                         </select>
                       </div>
                       <a href="javascript:void(0);" class="adv-term-remove hidden">
-                        <?php /* finc: add span for screenreader */ ?>
-                        <span class="sr-only"><?=$this->transEsc("remove")?></span>
+                        <span class="sr-only"><?=$this->transEsc("remove_adv_search_field")?></span>
                         <i class="fa fa-times" aria-hidden="true"></i>
                       </a>
                     </fieldset>