🐛(e2e) sync doc grid sorting check

The sorting check was not the same between
what django provide and what the e2e test
check, it was giving some flakiness.
Django seems to ignore the punctuation (space)
in its sorting.
We improve other test to be more robust
as well.

src/frontend/apps/e2e/__tests__/app-impress/doc-create.spec.ts

@@ -62,6 +62,8 @@ test.describe('Doc Create', () => {
       .getByLabel('Datagrid of the documents page 1')
       .getByRole('table');
 
+    await expect(datagrid.getByLabel('Loading data')).toBeHidden();
+
     await expect(datagrid.getByText(docTitle)).toBeVisible();
 
     const row = datagrid.getByRole('row').filter({