- Navigation header array structure now is the same as the structure of the navigation menu array

- Implemented the sort logic and added the "sort" attribute to sort menu and header entries for the NavigationWidget
- Added the private method _sortArray to the NavigationLib to sort menu and header entries
- Added the "target" attribute to be used with the attribute "link" to build the link of a menu or header entry
- Now the header menu supports icons on the left side of the entry description

public/css/NavigationWidget.css

@@ -33,3 +33,22 @@
 	font-weight: bold;
 	text-decoration: underline;
 }
+
+.navbar-brand {
+	float: left;
+	height: 50px;
+	padding-top: 15px;
+	padding-right: 20px;
+	padding-left: 7px;
+	font-size: 18px;
+	line-height: 20px;
+}
+
+.navbar-brand-icon {
+	float: left;
+	height: 50px;
+	padding-top: 15px;
+	padding-right: 12px;
+	padding-left: 7px;
+	font-size: 16px;
+}