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/bootstrap/less/scaffolding.less

@@ -7,7 +7,7 @@
 //
 // Heads up! This reset may cause conflicts with some third-party widgets.
 // For recommendations on resolving such conflicts, see
-// http://getbootstrap.com/getting-started/#third-box-sizing
+// https://getbootstrap.com/docs/3.4/getting-started/#third-box-sizing
 * {
   .box-sizing(border-box);
 }
@@ -21,7 +21,7 @@
 
 html {
   font-size: 10px;
-  -webkit-tap-highlight-color: rgba(0,0,0,0);
+  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
 }
 
 body {
@@ -111,7 +111,7 @@ img {
 // Horizontal rules
 
 hr {
-  margin-top:    @line-height-computed;
+  margin-top: @line-height-computed;
   margin-bottom: @line-height-computed;
   border: 0;
   border-top: 1px solid @hr-border;
@@ -120,21 +120,21 @@ hr {
 
 // Only display content to screen readers
 //
-// See: http://a11yproject.com/posts/how-to-hide-content
+// See: https://a11yproject.com/posts/how-to-hide-content
 
 .sr-only {
   position: absolute;
   width: 1px;
   height: 1px;
-  margin: -1px;
   padding: 0;
+  margin: -1px;
   overflow: hidden;
-  clip: rect(0,0,0,0);
+  clip: rect(0, 0, 0, 0);
   border: 0;
 }
 
 // Use in conjunction with .sr-only to only display content when it's focused.
-// Useful for "Skip to main content" links; see http://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/G1
+// Useful for "Skip to main content" links; see https://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/G1
 // Credit: HTML5 Boilerplate
 
 .sr-only-focusable {