refactor:删除仪表板的同时，清空画布数据

frontend/src/views/panel/list/PanelList.vue

@@ -463,6 +463,7 @@ export default {
             message: this.$t('panel.delete_success'),
             showClose: true
           })
+          this.clearCanvas()
           this.tree(this.groupForm)
           this.defaultTree()
         })
@@ -470,6 +471,17 @@ export default {
       })
     },
 
+    clearCanvas() {
+      // 清空当前缓存,快照
+      this.$store.commit('setComponentData', [])
+      this.$store.commit('setCanvasStyle', DEFAULT_COMMON_CANVAS_STYLE_STRING)
+      this.$store.dispatch('panel/setPanelInfo', {
+        id: null,
+        name: '',
+        preStyle: null
+      })
+    },
+
     close() {
       this.editGroup = false
       this.groupForm = {