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/select2/src/scss/core.scss

@@ -36,12 +36,14 @@
 .select2-hidden-accessible {
   border: 0 !important;
   clip: rect(0 0 0 0) !important;
+  -webkit-clip-path: inset(50%) !important;
+  clip-path: inset(50%) !important;
   height: 1px !important;
-  margin: -1px !important;
   overflow: hidden !important;
   padding: 0 !important;
   position: absolute !important;
   width: 1px !important;
+  white-space: nowrap !important;
 }
 
 @import "theme/default/layout";

front/lib/AdminLTE/bower_components/select2/src/scss/theme/classic/_multiple.scss

@@ -56,9 +56,6 @@
   .select2-selection--multiple {
     .select2-selection__choice {
       float: right;
-    }
-
-    .select2-selection__choice {
       margin-left: 5px;
       margin-right: auto;
     }

front/lib/AdminLTE/bower_components/select2/src/scss/theme/default/_multiple.scss

@@ -16,14 +16,6 @@
     }
   }
 
-  .select2-selection__placeholder {
-    color: #999;
-
-    margin-top: 5px;
-
-    float: left;
-  }
-
   .select2-selection__clear {
     cursor: pointer;
     float: right;
@@ -63,7 +55,7 @@
 
 &[dir="rtl"] {
   .select2-selection--multiple {
-    .select2-selection__choice, .select2-selection__placeholder, .select2-search--inline {
+    .select2-selection__choice, .select2-search--inline {
       float: right;
     }