修复popover组件方向问题

src/components/GGanttBar.vue

@@ -111,6 +111,8 @@ const placement = ref('right');
 const onMouseEvent = (e: MouseEvent) => {
  if(e.pageX >=1000){
    placement.value = 'left';
+ }else{
+    placement.value = 'right';
  }
   
   e.preventDefault();