save button in free table grid

packages/web/src/datagrid/DataGridToolbar.js

@@ -13,7 +13,7 @@ export default function DataGridToolbar({ reload, grider, save }) {
       <ToolbarButton disabled={!grider.canRedo} onClick={() => grider.redo()} icon="fas fa-redo">
         Redo
       </ToolbarButton>
-      <ToolbarButton disabled={!grider.containsChanges} onClick={save} icon="fas fa-save">
+      <ToolbarButton disabled={!grider.allowSave} onClick={save} icon="fas fa-save">
         Save
       </ToolbarButton>
       <ToolbarButton disabled={!grider.containsChanges} onClick={() => grider.revertAllChanges()} icon="fas fa-times">

packages/web/src/datagrid/Grider.ts

@@ -28,6 +28,9 @@ export default abstract class Grider {
   get canInsert() {
     return false;
   }
+  get allowSave() {
+    return this.containsChanges;
+  }
   get rowCountInUpdate() {
     return this.rowCount;
   }

packages/web/src/freetable/FreeTableGrider.ts

@@ -33,6 +33,9 @@ export default class FreeTableGrider extends Grider {
   get canInsert() {
     return true;
   }
+  get allowSave() {
+    return true;
+  }
   insertRow(): number {
     const model = this.currentModel;
     this.currentModel = {