NEZ-2760 fix：变量弹框超出滚动区域

nezha-fronted/src/assets/css/components/page/integration/integration.scss

@@ -215,7 +215,7 @@
         border: none !important;
         i.nz-icon{
           font-size: 14px;
-          padding-right: 6px;
+          padding-right: 2px;
         }
         span{
           font-size: 14px;

nezha-fronted/src/components/common/panel/panelVariables.vue

@@ -1,5 +1,5 @@
 <template>
-  <div style="" class="panel-variables-box">
+  <div style="z-index: 1001;" class="panel-variables-box">
     <div v-for="(item,index) in labelArr" :key="index" v-if="item.show" class="panel-variables-content" style="display: flex">
       <div class="variable-key" :title="item.name">{{item.name}}</div>
       <el-popover
@@ -8,6 +8,10 @@
         v-model="item.visible"
         v-clickoutside="close"
         popper-class="no-style-class ping-popover panel-variables nz-el-dropdown-menu"
+        :append-to-body="false"
+        :popper-options="{
+          forceAbsolute: true
+        }"
       >
         <ul class="pop-list-wrap">
           <li class="el-dropdown-menu__item" v-if="item.allOption">