(feature)(webapp) add show case and support multiple selection and deletion of filter conditions (#251)

webapp/packages/chat-sdk/src/components/DrillDownDimensions/style.less

@@ -5,7 +5,6 @@
 .@{drill-down-dimensions-prefix-cls} {
   display: flex;
   flex-direction: column;
-  margin-top: 2px;
 
   &-section {
     width: 100%;
@@ -13,7 +12,6 @@
     align-items: center;
     flex-wrap: wrap;
     column-gap: 6px;
-    margin-top: 6px;
   }
 
   &-metric-card {