update dropdown style

package.json

@@ -16,12 +16,12 @@
     "gregorian-calendar-format": "~3.0.1",
     "rc-calendar": "~3.9.0",
     "rc-dialog": "~4.3.1",
-    "rc-dropdown": "~1.0.0",
+    "rc-dropdown": "~1.0.1",
     "rc-menu": "~3.3.0",
     "rc-progress": "~1.0.0",
     "rc-select": "~3.3.5",
     "rc-tabs": "~5.1.0",
-    "rc-tooltip": "~2.0.1"
+    "rc-tooltip": "~2.1.0"
   },
   "devDependencies": {
     "babel-core": "~5.4.7",

style/components/dropdown.less

@@ -11,6 +11,11 @@
   font-weight: normal;
   line-height: 1.5;
   padding-top: 7px;
+  min-width: 100%;
+
+  &-wrap {
+    position: relative;
+  }
 
   &-menu {
     outline: none;