Hygiene: Fixing default table styling

Since we are forcing tables to use display block instead of display
table, having a border on both the cells and the table looks weird.
We really only need borders on the th and td, which we already have.

Note due to the use of reset.css in MobileFrontend this will
revert to border none.

Change-Id: Icffcb9cb89e01b4450fd9c2ea197288c021b56ef
Merge "Hygiene: Fixing default table styling"