(core) Allow descriptions for Raw Data tables

Summary: Descriptions can now be set on Raw Data table sections.

Test Plan: Browser tests.

Reviewers: jarek

Reviewed By: jarek

Differential Revision: https://phab.getgrist.com/D4131

app/client/components/DataTables.ts

@@ -482,5 +482,6 @@ const cssFlexRow = styled('div', `
 `);
 
 const cssRenamableTableName = styled('div', `
+  align-items: center;
   flex: initial;
 `);