Fix the text in the "Status" column being slightly offset vertically when compared to other columns. This was due to the default border spacing being ~2px, whereas WordPress uses 0px spacing for its own tables. 
   
   Note that this change makes the status column slightly more vertically compressed. The change is fairly insignificant; I'll just accept it.

git-svn-id: https://plugins.svn.wordpress.org/broken-link-checker/trunk@1025095 b8457f37-d9ea-0310-8a92-e5e31aec5664