Comment 3 for bug 226535

Lp has about 100 pathoglogical bugs. I suspect we need to increase the size of the shortlist, of allow users to delete invalid bug tasks that could not be retargeted.
 # bugs | # bug tasks
--------+-------
     16 | 15
     17 | 11
     18 | 19
     19 | 12
     20 | 6
     21 | 13
     22 | 4
     23 | 5
     24 | 8
     25 | 3
     26 | 3
     27 | 3
     28 | 3
     30 | 5
     32 | 1
     34 | 1
     35 | 3
     36 | 1
     37 | 1
     40 | 1
     44 | 1
     45 | 1
     46 | 4
     47 | 1
     52 | 3
     54 | 2
     71 | 1
     72 | 1
     73 | 1
     75 | 1
     92 | 1
   159 | 1