CC-1986: Configurable columns for media search

- added column 'utime' (upload time) and 'lptime' (last played time) in the tables cc_files and cc_playlist

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

@@ -449,6 +449,9 @@ function setUpSPL() {
             }
             
             $("#fieldset-metadate_change").addClass("closed");
+            
+            // update the "Last Modified" time for this playlist
+            redrawDataTablePage();
         });
     });