Added search highlighting

[DavidMove]

Details

• Inside renderRows function I added some logic to wrap <span class="bootgrid-search-highlight"> tags around the search term.
• We couldn't do a simple string search and replace because otherwise it will replace HTML tags or text inside HTML attributes. So we needed to traverse through the actual nodes and only replace the text within it.
• When replacing the search phrase for each node it will encode all symbols. So we needed to do another replace on the entire string afterwards.

Screenshots

[Iodine-]

Looks good