web: Overrides few rules for PF/Table headers

[dgdavid]

Problem

Sometimes table headers with an space in their content are cut and uses the text-overflow value of CSS property, even when looking at it seems that there is enough space. Actually, there isn't because of margins paddings and so.

Solution

To overrides the PF/Table styles for setting the white-space CSS property from nowrap to normal.

Forcing a size per column it's not a solution because

• it does not warrant that it's the right size for the same content in different languages, and
• it is preferred to let the browser laying out the table according to the available space (among others)

Testing

Tested manually.

Note for reviewers

Although it has a little visual impact, I do not believe this deserves an entry in the changelog. But let me know if you think it should be added.

Screenshots

Before	After

[coveralls]

coverage: 74.817%. remained the same
when pulling a061d45 on override-table-header-styles
into 4d6b858 on master.

[ancorgs]

LGTM