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/bower_components/jquery-ui/themes/base/datepicker.css

@@ -1,5 +1,5 @@
 /*!
- * jQuery UI Datepicker 1.11.4
+ * jQuery UI Datepicker 1.12.1
  * http://jqueryui.com
  *
  * Copyright jQuery Foundation and other contributors
@@ -173,3 +173,13 @@
 	border-right-width: 0;
 	border-left-width: 1px;
 }
+
+/* Icons */
+.ui-datepicker .ui-icon {
+	display: block;
+	text-indent: -99999px;
+	overflow: hidden;
+	background-repeat: no-repeat;
+	left: .5em;
+	top: .3em;
+}