fixes #1315 filter on tags no longer cares about case

* searching "Pa" will find both "Pasta" and "pasta"
* the searched word can be "included" in the result, not only "starting with". "ta" will find "pasta".

Thanks to @dawsk-2021 in issue #1320

admin/themes/default/js/tags.js

@@ -795,9 +795,9 @@ function isSearched(tagBox, stringSearch) {
 }
 
 function isDataSearched(tagObj) {
-  let name = tagObj.name;
+  let name = tagObj.name.toLowerCase();
   let stringSearch = $("#search-tag .search-input").val();
-  if (name.startsWith(stringSearch.toLowerCase())) {
+  if (name.includes(stringSearch.toLowerCase())) {
     return true;
   } else {
     return false;