CN-1734 fix: 细节调整

src/assets/css/components/views/setting/entitySettingForm.scss

@@ -145,7 +145,7 @@ $border-color-light: var(--el-border-color-light);
 
             .block-header__menu {
               display: flex;
-              padding: 10px;
+              padding: 10px 10px 0 10px;
               font-weight: bold;
 
               div:nth-child(1) {

src/views/setting/entitySetting/EntitySettingForm.vue

@@ -76,7 +76,7 @@
                       </el-select>
                     </el-form-item>
                     <i class="cn-icon cn-icon-add mapping-item-add" @click="addMappingListItem(index, ind)"></i>
-                    <i class="cn-icon cn-icon-close mapping-item-close" @click="deleteMappingItem(index, ind)"></i>
+                    <i class="cn-icon cn-icon-close mapping-item-close" @click="deleteMappingItem(index, ind)" v-if="ind > 0"></i>
                   </div>
                 </div>
               </el-form>