CC-4539: Advanced search: Sample rate searched on Hz, but search results

shown in kHz

- fixed

airtime_mvc/public/js/airtime/library/library.js

@@ -1195,7 +1195,7 @@ var validationTypes = {
     "owner_id" : "s",
     "rating" : "i",
     "replay_gain" : "n",
-    "sample_rate" : "i",
+    "sample_rate" : "n",
     "track_title" : "s",
     "track_number" : "i",
     "info_url" : "s",

airtime_mvc/public/js/datatables/plugin/dataTables.columnFilter.js

@@ -190,7 +190,7 @@
             } else if (th.attr('id') == "length") {
                 label = " hh:mm:ss.t";
             } else if (th.attr('id') == "sample_rate") {
-                label = " Hz";
+                label = " kHz";
             }
             
             th.html(_fnRangeLabelPart(0));