refactor(数据大屏、仪表板): 优化Tab标题点击事件，点击标题不计入批量选择

core/core-frontend/src/custom-component/de-tabs/Component.vue

@@ -23,6 +23,7 @@
           :name="tabItem.name"
         >
           <template #label>
+            <div @mousedown.stop>
               <span :style="titleStyle(tabItem.name)">{{ tabItem.title }}</span>
               <el-dropdown
                 v-if="isEditMode"
@@ -49,6 +50,7 @@
                   </el-dropdown-menu>
                 </template>
               </el-dropdown>
+            </div>
           </template>
           <de-canvas
             v-if="isEdit && !mobileInPc"