Core: add config.table variable

docs/index.html

@@ -4951,6 +4951,18 @@ $('.tablesorter')[0].config.cache[0].normalized[0];
 				<td></td>
 			</tr>
 
+			<tr id="variable-table-element">
+				<td><a href="#" class="permalink">config.table</a></td>
+				<td>DOM element</td>
+				<td>Internally stored DOM table element (<span class="version">v2.17.5</span>)
+					<div class="collapsible">
+					<br>
+					The <code>table.config.table</code> variable is useful when certain callback functions only pass the config object; originally you could use <code>config.$table[0]</code>, but this saves that small extra trouble.
+					</div>
+					</td>
+				<td></td>
+			</tr>
+
 			<tr id="variable-table">
 				<td><a href="#" class="permalink">config.$table</a></td>
 				<td>jQuery Object</td>

js/jquery.tablesorter.js

@@ -1016,6 +1016,7 @@
 				if (!/tablesorter\-/.test($table.attr('class'))) {
 					k = (c.theme !== '' ? ' tablesorter-' + c.theme : '');
 				}
+				c.table = table;
 				c.$table = $table
 					.addClass(ts.css.table + ' ' + c.tableClass + k)
 					.attr({ role : 'grid'});