[PATCH] remove Reported column and introduce Source column

[Jiri Moskovcak]

as a part of gui revamp I removed the column "Reported" and replaced it 
with column "Source" which is supposed to show the source of the 
problem: it defaults to component otherwise it shows executable. The 
idea about this column is to point user closer to the problem without 
forcing him to do the search manually (like mapping the executable name 
to package). Some use-cases:

sealert was killed by signal SIGSEGV: Source = setroubleshoot
Out of paper: Source = printer01
Too many dropped packets: Source = ethX
HDD failing: Source = sda

Please review,
Jirka