FilterDataTable whitespace collapsing problems

[driusan]

The FilterableDataTable can cause confusion if the data in the table contains multiple consecutive whitespace characters. The table cell will collapse the whitespace to a single space as per HTML whitespace-collapsing rules, but searching for the string containing a single space will not match the result.

For instance, if a cell contains a b it will be rendered as "a b" but searching for a b will not match the row because the data is a b and not a b