refactor example demo (#713)

* refactor: Adjust the example directory structure

* perf form demo

* refine editor-slide-upload css

* refine demo

src/views/example/components/Dropdown/Comment.vue

@@ -0,0 +1,31 @@
+<template>
+  <el-dropdown trigger="click" :show-timeout="100">
+    <el-button plain>{{!comment_disabled?'评论已打开':'评论已关闭'}}
+      <i class="el-icon-caret-bottom el-icon--right"></i>
+    </el-button>
+    <el-dropdown-menu class="no-padding" slot="dropdown">
+      <el-dropdown-item>
+        <el-radio-group style="padding: 10px;" v-model="comment_disabled">
+          <el-radio :label="true">关闭评论</el-radio>
+          <el-radio :label="false">打开评论</el-radio>
+        </el-radio-group>
+      </el-dropdown-item>
+    </el-dropdown-menu>
+  </el-dropdown>
+</template>
+
+<script>
+export default {
+  props: ['value'],
+  computed: {
+    comment_disabled: {
+      get() {
+        return this.value
+      },
+      set(val) {
+        this.$emit('input', val)
+      }
+    }
+  }
+}
+</script>