[unlocalized strings] Sanitize English words before displaying, fix first row style

[flodolo]

Realized on my demo server where the packages weren't installed yet, HTML code was displayed as part of the English string (and iframe was displayed).

We shouldn't also displaying the first row as an header (I had the same issue with the consistency table, so there's a rule do display the right color).

[flodolo]

Maybe we should strip tags from the string before splitting it up into words