Chronograf UI improvement: Fix table cell width with URL content

Table cell width is currently adjusted to the size of the underlying string. However, if the string is an URL like the one in the attached screenshot, the cell width should adjust to the size of the URL title to avoid that empty space.

This fix is not just aesthetical, it limits the number of columns we can have in the table. As a workaround, the user might consider displaying the content in multiple tables.

We should disable the title as the user hover over the table cells, they are really annoying.