Merge pull request #250 from elasticsales/includeSelectAllDivider

includeSelectAllDivider option including documentation.

index.html

@@ -800,6 +800,24 @@
       includeSelectAllOption: true
     });
   });
+</script>
+							</pre>
+						</td>
+					</tr>
+					<tr>
+						<td><code>includeSelectAllDivider</code></td>
+						<td>
+                            If set to <code>true</code> (along with <code>includeSelectAllOption</code>) a divider will be placed below the 'Select all' option.
+						</td>
+						<td>
+							<pre class="prettyprint linenums">
+&lt;script type=&quot;text/javascript&quot;&gt;
+  $(document).ready(function() {
+    $(&#39;.multiselect&#39;).multiselect({
+      includeSelectAllOption: true,
+      includeSelectAllDivider: true
+    });
+  });
 &lt;/script&gt;
 							</pre>
 						</td>

js/bootstrap-multiselect.js

@@ -575,6 +575,9 @@
             
             // If options.includeSelectAllOption === true, add the include all checkbox.
             if (this.options.includeSelectAllOption && this.options.multiple && !alreadyHasSelectAll) {
+                if (this.options.includeSelectAllDivider) {
+                    this.$select.prepend('<option value="" disabled="disabled" data-role="divider">');
+                }
                 this.$select.prepend('<option value="' + this.options.selectAllValue + '">' + this.options.selectAllText + '</option>');
             }
         },