Added sort routine for adding items to select

Items are placed in the selects in the order they are found in the data.

This fix sorts the options as they are added to the select element

src/extensions/filter-control/bootstrap-table-filter-control.js

@@ -67,6 +67,22 @@
             selectControl.append($("<option></option>")
                 .attr("value", value)
                 .text($('<div />').html(text).text()));
+            // Sort it. Not overly efficient to do this here
+            var $opts = selectControl.find('option:gt(0)');
+            $opts.sort(function(a,b){
+                a = $(a).text().toLowerCase();
+                b = $(b).text().toLowerCase();
+                if (a === undefined || a === null) { a = ''; }
+                if (b === undefined || b === null) { b = ''; }
+                if ($.isNumeric(a) && $.isNumeric(b)) {
+                    // Convert numerical values from string to float.
+                    a = parseFloat(a);
+                    b = parseFloat(b);
+                }
+                return a > b ? 1 : a < b ? -1 : 0;
+            });
+			selectControl.find('option:gt(0)').remove();
+			selectControl.append($opts);
         }
     };