fix inline form,dropdown style

examples/docs/zh-cn/dropdown.md

@@ -12,7 +12,6 @@
       color: #20a0ff;
     }
     .el-icon-caret-bottom {
-      vertical-align: middle;
       font-size: 12px;
     }
   }

examples/docs/zh-cn/form.md

@@ -86,7 +86,8 @@
         ],
         rules: {
           name: [
-            { required: true, message: '请输入活动名称', trigger: 'blur' }
+            { required: true, message: '请输入活动名称', trigger: 'blur' },
+            { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
           ],
           region: [
             { required: true, message: '请选择活动区域', trigger: 'change' }

packages/theme-default/src/dropdown.css

@@ -54,7 +54,6 @@
     }
     @e icon {
       font-size: 12px;
-      vertical-align: middle;
       margin: 0 3px;
     }
     @m text {

packages/theme-default/src/form.css

@@ -19,10 +19,7 @@
       & .el-form-item {
         display: inline-block;
         margin-right: 10px;
-
-        > * {
-          vertical-align: top;
-        }
+        vertical-align: top;
       }
     }
   }