diff --git a/css/ui-lightness/jqueryui.scss b/css/ui-lightness/jqueryui.scss
index 37ebb2ec5..00208f723 100644
--- a/css/ui-lightness/jqueryui.scss
+++ b/css/ui-lightness/jqueryui.scss
@@ -4,6 +4,8 @@
 * To view and modify this theme, visit http://jqueryui.com/themeroller/?scope=&folderName=custom-theme&bgImgOpacityError=18&bgImgOpacityHighlight=75&bgImgOpacityActive=65&bgImgOpacityHover=100&bgImgOpacityDefault=100&bgImgOpacityContent=100&bgImgOpacityHeader=35&cornerRadiusShadow=5px&offsetLeftShadow=-5px&offsetTopShadow=-5px&thicknessShadow=5px&opacityShadow=20&bgImgOpacityShadow=10&bgTextureShadow=flat&bgColorShadow=%23000000&opacityOverlay=50&bgImgOpacityOverlay=20&bgTextureOverlay=diagonals_thick&bgColorOverlay=%23666666&iconColorError=%23ffd27a&fcError=%23ffffff&borderColorError=%23cd0a0a&bgTextureError=diagonals_thick&bgColorError=%23b81900&iconColorHighlight=%231c94c4&fcHighlight=%23363636&borderColorHighlight=%23fed22f&bgTextureHighlight=flat&bgColorHighlight=%23ffe45c&iconColorActive=%23E87C1E&fcActive=%23E87C1E&borderColorActive=%23E87C1E&bgTextureActive=flat&bgColorActive=%23ffffff&iconColorHover=%23E87C1E&fcHover=%23E87C1E&borderColorHover=%23E87C1E&bgTextureHover=flat&bgColorHover=%23fde17c&iconColorDefault=%23F26522&fcDefault=%23555555&borderColorDefault=%23cccccc&bgTextureDefault=flat&bgColorDefault=%23f1f1f1&iconColorContent=%23222222&fcContent=%23333333&borderColorContent=%23dddddd&bgTextureContent=flat&bgColorContent=%23eeeeee&iconColorHeader=%23ffffff&fcHeader=%23ffffff&borderColorHeader=%23F26522&bgTextureHeader=flat&bgColorHeader=%23E87C1E&cornerRadius=0&fwDefault=bold&fsDefault=1.1em&ffDefault=Trebuchet%20MS%2CTahoma%2CVerdana%2CArial%2Csans-serif
 * Copyright jQuery Foundation and other contributors; Licensed MIT 
 * The original css file has been scssized (through www.css2scss.com)
+*
+* Other modification done : replaced the `Alpha(` by `alpha(` to avoid warnings generated by SCSSPHP
  */
 .ui-draggable-handle {
     -ms-touch-action: none;
@@ -46,26 +48,27 @@
     }
 }
 .ui-helper-zfix {
-    width: 100%;
-    height: 100%;
-    top: 0;
-    left: 0;
-    position: absolute;
-    opacity: 0;
-    filter: Alpha(Opacity=0);
+  width: 100%;
+  height: 100%;
+  top: 0;
+  left: 0;
+  position: absolute;
+  opacity: 0;
+  filter: alpha(Opacity=0);
 }
 .ui-front {
     z-index: 100;
 }
 .ui-state-disabled {
-    cursor: default !important;
-    pointer-events: none;
-    opacity: .35;
-    filter: Alpha(Opacity=35);
-    background-image: none;
-    .ui-icon {
-        filter: Alpha(Opacity=35);
-    }
+  cursor: default !important;
+  pointer-events: none;
+  opacity: .35;
+  filter: alpha(Opacity=35);
+  background-image: none;
+
+  .ui-icon {
+    filter: alpha(Opacity=35);
+  }
 }
 .ui-icon {
     display: inline-block;
@@ -86,14 +89,14 @@
     display: block;
 }
 .ui-widget-overlay {
-    position: fixed;
-    top: 0;
-    left: 0;
-    width: 100%;
-    height: 100%;
-    background: #666666 url($approot-relative + "css/ui-lightness/images/ui-bg_diagonals-thick_20_666666_40x40.png?v=" + $version) 50% 50% repeat;
-    opacity: .5;
-    filter: Alpha(Opacity=50);
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  background: #666666 url($approot-relative + "css/ui-lightness/images/ui-bg_diagonals-thick_20_666666_40x40.png?v=" + $version) 50% 50% repeat;
+  opacity: .5;
+  filter: alpha(Opacity=50);
 }
 .ui-resizable {
     position: relative;
@@ -1069,14 +1072,14 @@ body {
         font-weight: bold;
     }
     .ui-priority-secondary {
-        opacity: .7;
-        filter: Alpha(Opacity=70);
-        font-weight: normal;
+      opacity: .7;
+      filter: alpha(Opacity=70);
+      font-weight: normal;
     }
     .ui-state-disabled {
-        opacity: .35;
-        filter: Alpha(Opacity=35);
-        background-image: none;
+      opacity: .35;
+      filter: alpha(Opacity=35);
+      background-image: none;
     }
     .ui-icon {
         background-image: url($approot-relative + "css/ui-lightness/images/ui-icons_222222_256x240.png?v=" + $version);
@@ -1137,14 +1140,14 @@ body {
         font-weight: bold;
     }
     .ui-priority-secondary {
-        opacity: .7;
-        filter: Alpha(Opacity=70);
-        font-weight: normal;
+      opacity: .7;
+      filter: alpha(Opacity=70);
+      font-weight: normal;
     }
     .ui-state-disabled {
-        opacity: .35;
-        filter: Alpha(Opacity=35);
-        background-image: none;
+      opacity: .35;
+      filter: alpha(Opacity=35);
+      background-image: none;
     }
     .ui-icon {
         background-image: url($approot-relative + "css/ui-lightness/images/ui-icons_ffffff_256x240.png?v=" + $version);
@@ -1341,9 +1344,9 @@ a {
     font-weight: bold;
 }
 .ui-priority-secondary {
-    opacity: .7;
-    filter: Alpha(Opacity=70);
-    font-weight: normal;
+  opacity: .7;
+  filter: alpha(Opacity=70);
+  font-weight: normal;
 }
 .ui-icon-blank {
     background-position: 16px 16px;