upgrade and optimize css

package.json

@@ -41,7 +41,7 @@
     "rc-calendar": "4.0.0-alpha10",
     "rc-checkbox": "~1.1.1",
     "rc-collapse": "~1.4.0",
-    "rc-dialog": "~5.1.0",
+    "rc-dialog": "~5.2.0",
     "rc-dropdown": "~1.4.3",
     "rc-form-validation": "~2.4.7",
     "rc-input-number": "~2.3.0",
@@ -51,7 +51,7 @@
     "rc-progress": "~1.0.0",
     "rc-queue-anim": "~0.10.5",
     "rc-radio": "~2.0.0",
-    "rc-select": "~5.0.0",
+    "rc-select": "~5.0.2",
     "rc-slider": "~2.0.0",
     "rc-steps": "~1.4.0",
     "rc-switch": "~1.2.0",

style/components/dialog/Dialog.less

@@ -11,7 +11,7 @@
     -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
   }
 
-  &-wrap-hidden > & {
+  &-hidden {
     display: none;
   }
 

style/components/dialog/Mask.less

@@ -1,9 +1,4 @@
 .@{dialog-prefix-cls} {
-
-  &-wrap-hidden > &-mask {
-    display: none;
-  }
-
   &-mask {
     position: fixed;
     top: 0;
@@ -15,6 +10,9 @@
     height: 100%;
     z-index: 1000;
     filter: alpha(opacity=50);
-  }
 
+    &-hidden {
+      display: none;
+    }
+  }
 }

style/components/menu.less

@@ -12,6 +12,10 @@
   color: @text-color;
   background: #fff;
 
+  &-hidden {
+    display: none;
+  }
+
   &-item-group-list {
     margin: 0;
     padding: 0;
@@ -93,7 +97,6 @@
     position: relative;
 
     > .@{menu-prefix-cls} {
-      display: none;
       background-color: #fff;
     }
 
@@ -128,14 +131,10 @@
     }
 
     &-open {
-      > .@{menu-prefix-cls} {
-        display: block;
-      }
       &.@{menu-prefix-cls}-submenu-inline > .@{menu-prefix-cls}-submenu-title:after {
         .ie-rotate(1);
         transform: rotate(180deg) scale(0.75);
       }
-
     }
   }
 

style/core/motion.less

@@ -1,7 +1,6 @@
 .motion-common() {
   animation-duration: .3s;
   animation-fill-mode: both;
-  display: block !important;
 }
 
 .make-motion(@className, @keyframeName) {