Improve checkbox click handling support for grids

i.e. let custom use define click handlers

tailbone/static/js/tailbone.buefy.grid.js

@@ -93,6 +93,10 @@ Vue.component('grid-filter', GridFilter)
 let TailboneGrid = {
     template: '#tailbone-grid-template',
 
+    props: {
+        csrftoken: String,
+    },
+
     computed: {
         // note, can use this with v-model for hidden 'uuids' fields
         selected_uuids: function() {
@@ -120,14 +124,14 @@ let TailboneGrid = {
 
             this.loading = true
             this.$http.get(`${this.ajaxDataUrl}?${params}`).then(({ data }) => {
-                this.data = data.data
+                TailboneGridCurrentData = data.data
+                this.data = TailboneGridCurrentData
                 this.rowStatusMap = data.row_status_map
                 this.total = data.total_items
                 this.firstItem = data.first_item
                 this.lastItem = data.last_item
                 this.loading = false
-                // TODO: should "merge" checked results from server?
-                this.checkedRows = []
+                this.checkedRows = this.locateCheckedRows(data.checked_rows)
             })
             .catch((error) => {
                 this.data = []
@@ -137,6 +141,18 @@ let TailboneGrid = {
             })
         },
 
+        locateCheckedRows(checked) {
+            let rows = []
+            if (checked) {
+                for (let i = 0; i < this.data.length; i++) {
+                    if (checked.includes(i)) {
+                        rows.push(this.data[i])
+                    }
+                }
+            }
+            return rows
+        },
+
         onPageChange(page) {
             this.page = page
             this.loadAsyncData()
@@ -244,6 +260,14 @@ let TailboneGrid = {
                 uuids.push(row.uuid)
             }
             return uuids
-        }
+        },
+
+        allRowUUIDs() {
+            let uuids = []
+            for (let row of this.data) {
+                uuids.push(row.uuid)
+            }
+            return uuids
+        },
     }
 }