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/ion.rangeSlider/less/_mixins.less

@@ -0,0 +1,17 @@
+.no-click () {
+    -webkit-user-select: none;
+    -khtml-user-select: none;
+    -moz-user-select: none;
+    -ms-user-select: none;
+    user-select: none;
+}
+
+.pos-r () {
+    position: relative;
+    display: block;
+}
+
+.pos-a () {
+    position: absolute;
+    display: block;
+}