Tabs: remove focus state when before-leave return a resolved promise (#11386)

packages/tabs/src/tabs.vue

@@ -77,6 +77,8 @@
           if (before && before.then) {
             before.then(() => {
               changeCurrentName();
+
+              this.$refs.nav && this.$refs.nav.removeFocus();
             });
           } else if (before !== false) {
             changeCurrentName();