修复mb-select不能重置选择bug

优化mb-table左右翻页请求

magic-boot-ui/src/components/MagicBoot/mb-select.vue

@@ -101,7 +101,7 @@ export default {
   },
   methods: {
     async loadData() {
-      if (this.value) {
+      if (this.value || this.value == '') {
         if ((!(this.value instanceof Array) && this.value.toString().indexOf(',') !== -1)) {
           this.selectValue = this.value.split(',')
         } else {

magic-boot-ui/src/components/MagicBoot/mb-table.vue

@@ -199,14 +199,15 @@ export default {
           if (e && e.keyCode == 37) {
             if(this.listCurrent != 1){
               this.listCurrent -= 1
+              this.handlerPagination()
             }
           } else if (e && e.keyCode == 39) {
             if(this.listCurrent != parseInt((this.total + this.limit - 1) / this.limit)){
               this.listCurrent += 1
+              this.handlerPagination()
             }
           }
         }
-        this.handlerPagination()
       }
     }
   }