Fixes NB#600973, tracker-control: don't use "-h" to remove thumbnails
Fixes NB#600973, tracker-control: don't use "-h" to remove thumbnails

hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker