Poptip add prop popper-class, Table update

src/components/poptip/poptip.vue

@@ -97,6 +97,9 @@
             transfer: {
                 type: Boolean,
                 default: false
+            },
+            popperClass: {
+                type: String
             }
         },
         data () {
@@ -120,7 +123,8 @@
                 return [
                     `${prefixCls}-popper`,
                     {
-                        [`${prefixCls}-confirm`]: this.transfer && this.confirm
+                        [`${prefixCls}-confirm`]: this.transfer && this.confirm,
+                        [`${this.popperClass}`]: !!this.popperClass
                     }
                 ];
             },

src/components/table/cell.vue

@@ -1,6 +1,6 @@
 <template>
     <div :class="classes" ref="cell">
-        <template v-if="renderType === 'index'">{{naturalIndex + 1}}</template>
+        <template v-if="renderType === 'index'"><span>{{naturalIndex + 1}}</span></template>
         <template v-if="renderType === 'selection'">
             <Checkbox :value="checked" @click.native.stop="handleClick" @on-change="toggleSelect" :disabled="disabled"></Checkbox>
         </template>

src/components/table/table-head.vue

@@ -23,6 +23,8 @@
                                 v-if="isPopperShow(column)"
                                 v-model="column._filterVisible"
                                 placement="bottom"
+                                popper-class="ivu-table-popper"
+                                transfer
                                 @on-popper-hide="handleFilterHide(column._index)">
                                 <span :class="[prefixCls + '-filter']">
                                     <i class="ivu-icon ivu-icon-funnel" :class="{on: column._isFiltered}"></i>