Merge remote-tracking branch 'github/master' into dev/dj-searchbox

* github/master:
  Fix bugs in URL generation for stack viewer
  Fixing TILELOADER
Resync and Sync operations work if no file is deleted
Merge branch 'fix/resync-no-delete'

* fix/resync-no-delete:
  Resync and Sync operations work if no file is deleted