Fixed a visual issue in some of the webui tables.
Fixed a visual issue in some of the webui tables.

The number of columns was inaccurate which led to a whitespace
issue (see the screenshots in the review).

Review: https://reviews.apache.org/r/54411/

dforsyth/mesos,Gilbert88/mesos,Aman-Jain-14/customizedMesos,neilconway/mesos,jpeach/mesos,craimbert/mesos,dforsyth/mesos,jpeach/mesos,zmalik/mesos,verizonlabs/mesos,Aman-Jain-14/customizedMesos,abudnik/mesos,abudnik/mesos,reneploetz/mesos,yuquanshan/customizedMesos,gsantovena/mesos,zmalik/mesos,abudnik/mesos,yuquanshan/customizedMesos,Aman-Jain-14/customizedMesos,yuquanshan/customizedMesos,Aman-Jain-14/customizedMesos,verizonlabs/mesos,jpeach/mesos,andschwa/mesos,asamerh4/mesos,kaysoky/mesos,kaysoky/mesos,chhsia0/mesos,gsantovena/mesos,andschwa/mesos,reneploetz/mesos,craimbert/mesos,yuquanshan/customizedMesos,Gilbert88/mesos,yuquanshan/customizedMesos,dforsyth/mesos,asamerh4/mesos,verizonlabs/mesos,verizonlabs/mesos,Gilbert88/mesos,jpeach/mesos,craimbert/mesos,zmalik/mesos,dforsyth/mesos,gsantovena/mesos,jpeach/mesos,jpeach/mesos,abudnik/mesos,Aman-Jain-14/customizedMesos,gsantovena/mesos,Gilbert88/mesos,verizonlabs/mesos,kaysoky/mesos,reneploetz/mesos,yuquanshan/customizedMesos,zmalik/mesos,andschwa/mesos,Gilbert88/mesos,abudnik/mesos,Aman-Jain-14/customizedMesos,andschwa/mesos,asamerh4/mesos,Gilbert88/mesos,asamerh4/mesos,neilconway/mesos,dforsyth/mesos,jpeach/mesos,neilconway/mesos,kaysoky/mesos,chhsia0/mesos,chhsia0/mesos,chhsia0/mesos,abudnik/mesos,andschwa/mesos,reneploetz/mesos,chhsia0/mesos,kaysoky/mesos,craimbert/mesos,gsantovena/mesos,chhsia0/mesos,neilconway/mesos,verizonlabs/mesos,yuquanshan/customizedMesos,neilconway/mesos,kaysoky/mesos,zmalik/mesos,verizonlabs/mesos,reneploetz/mesos,asamerh4/mesos,zmalik/mesos,gsantovena/mesos,dforsyth/mesos,dforsyth/mesos,asamerh4/mesos,craimbert/mesos,Gilbert88/mesos,neilconway/mesos,Aman-Jain-14/customizedMesos,neilconway/mesos,reneploetz/mesos,asamerh4/mesos,chhsia0/mesos,kaysoky/mesos,abudnik/mesos,gsantovena/mesos,craimbert/mesos,reneploetz/mesos,andschwa/mesos,craimbert/mesos,zmalik/mesos,andschwa/mesos