fix the height on memberlist in dashboard page

frontend/src/component/Dashboard/MemberList.styl

@@ -15,11 +15,13 @@
     margin 0
     padding 0
     list-style none
-    height 400px
+    min-height 400px
     &__item
       display flex
       border-bottom 1px solid grey
       padding 10px 15px
+      // &:nth-last-child(1)
+      //   border-bottom 0
       &__avatar
         margin-right 20px
         & > img