Updates: minor style updates

Web/css/base.less

@@ -331,3 +331,44 @@ a.button:visited
     }
 
 }
+.shadowWithTransition {
+    .shadowFullCustomizable(0,7px,25px,rgba(0,0,0,.1));
+    .transition(box-shadow, .3s);
+}
+.shadowHover {
+    .shadowFullCustomizable(0,20px,40px,rgba(0,0,0,.1));
+}
+.shadowWithTransitionAndHover {
+    .shadowWithTransition;
+
+    &:hover {
+        .shadowHover;
+    }
+}
+.shadowLiteSmall {
+    .shadowFullCustomizable(0,7px,25px,rgba(85,85,85,.15));
+}
+.shadowLiteBlurred {
+    .shadowFullCustomizable(0px,15px,150px,rgba(85,85,85,.25));
+}
+.shadowDarkBlurred {
+    .shadowFullCustomizable(0px,15px,170px,rgba(0,0,0,.25));
+}
+.transition(@property: color, @time: .5s) {
+    -webkit-transition: @property @time;
+    -moz-transition:    @property @time;
+    -o-transition:      @property @time;
+    transition:         @property @time;
+}
+.transition2(@property: color, @time: .5s, @property2: border, @time2: .5s) {
+    -webkit-transition: @property @time,  @property2 @time2;
+    -moz-transition:    @property @time,  @property2 @time2;
+    -o-transition:      @property @time,  @property2 @time2;
+    transition:         @property @time,  @property2 @time2;
+}
+.transition3(@property: color, @time: .5s, @property2: border, @time2: .5s, @property3: background, @time3: .5s) {
+    -webkit-transition: @property @time,  @property2 @time2,  @property3 @time3;
+    -moz-transition:    @property @time,  @property2 @time2,  @property3 @time3;
+    -o-transition:      @property @time,  @property2 @time2,  @property3 @time3;
+    transition:         @property @time,  @property2 @time2,  @property3 @time3;
+}

Web/css/forms.less

@@ -3,7 +3,7 @@
 .PopupPanel {
     background-color: @defaultBgColor;
     border: 0;
-    .shadowFullCustomizable (@byX: 1px, @byY: 1px, @radius: 8px, @color: @popUpPanelBackground);
+    .shadowWithTransitionAndHover;
     cursor: default;
     display: none;
     opacity: 1;

Web/css/help.less

@@ -1738,6 +1738,7 @@ table.integrating_talk {
 }
 .block_also {
     background-color:#E0E1E6;
+    .shadowLiteSmall;
     bottom: 0;
     padding:10px 15px 15px 15px;
     position:fixed;

Web/js/core/main.js

@@ -53,7 +53,7 @@ BlockUIManager = {
                     "background-color": "Transparent"
                 },
                 overlayCSS: {
-                    backgroundColor: "#eee",
+                    backgroundColor: "#000",
                     cursor: "default",
                     opacity: "0.6"
                 },