Update AdminLTE

- from 2.4.5 to 2.4.18 (cannot detect any issues)
- set default scancycle for Apple Devices to 1

front/lib/AdminLTE/build/less/AdminLTE-without-plugins.less

@@ -1,10 +1,13 @@
 /*!
- *   AdminLTE v2.4.0 Without Third-Party Plugins
- *   Author: Almsaeed Studio
- *	 Website: Almsaeed Studio <https://adminlte.io>
- *   License: Open source - MIT
- *           Please visit http://opensource.org/licenses/MIT for more information
-!*/
+ * AdminLTE v2.4.18
+ * Without Third-Party Plugins
+ * 
+ *   Author:  Colorlib
+ *   Support: <https://github.com/ColorlibHQ/AdminLTE/issues>
+ *   Repository: git://github.com/ColorlibHQ/AdminLTE.git
+ *   License: MIT <http://opensource.org/licenses/MIT>
+ */
+
 //Bootstrap Variables & Mixins
 //The core bootstrap code have not been modified. These files
 //are included only for reference.