htmlreport: give warnig boxes ("HTML_ERROR") smaller frame and padding so they don't overlap each other if there is another one in next line.

borderwith: 2px -> 1px
padding:    3px -> 1px
font-size: 13px -> 11px

old: http://i.imgur.com/43FVXlu.png (probably zoomed out there a bit)
new: http://i.imgur.com/ynO0cbK.png