Upgrade to custom jQuery UI 1.12.1 due to errors with jQuery 3

vendors/jquery-ui/css/smoothness/jquery-ui-1.12.1.custom.css

@@ -37,9 +37,6 @@
 .ui-helper-clearfix:after {
 	clear: both;
 }
-.ui-helper-clearfix {
-	min-height: 0; /* support: IE7 */
-}
 .ui-helper-zfix {
 	width: 100%;
 	height: 100%;
@@ -47,7 +44,6 @@
 	left: 0;
 	position: absolute;
 	opacity: 0;
-	filter:Alpha(Opacity=0);
 }
 
 .ui-front {
@@ -59,6 +55,7 @@
 ----------------------------------*/
 .ui-state-disabled {
 	cursor: default !important;
+	pointer-events: none;
 }
 
 
@@ -67,12 +64,20 @@
 
 /* states and images */
 .ui-icon {
-	display: block;
+	display: inline-block;
+	vertical-align: middle;
+	margin-top: -.25em;
+	position: relative;
 	text-indent: -99999px;
 	overflow: hidden;
 	background-repeat: no-repeat;
 }
 
+.ui-widget-icon-block {
+	left: 50%;
+	margin-left: -8px;
+	display: block;
+}
 
 /* Misc visuals
 ----------------------------------*/
@@ -92,6 +97,8 @@
 	position: absolute;
 	font-size: 0.1px;
 	display: block;
+	-ms-touch-action: none;
+	touch-action: none;
 }
 .ui-resizable-disabled .ui-resizable-handle,
 .ui-resizable-autohide .ui-resizable-handle {