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/miscellaneous.less

@@ -604,3 +604,34 @@
     width: 100% !important;
   }
 }
+
+// Horizontal rules
+hr {
+  border-top: 1px solid @hr-border;
+}
+
+// bootstrap slider
+
+#red .slider-selection {
+    background: #f56954;
+}
+
+#blue .slider-selection {
+    background: #3c8dbc;
+}
+
+#green .slider-selection {
+    background: #00a65a;
+}
+
+#yellow .slider-selection {
+    background: #f39c12;
+}
+
+#aqua .slider-selection {
+    background: #00c0ef;
+}
+
+#purple .slider-selection {
+    background: #932ab6;
+}