fix rendering issues

[theabhirock74]

Fix child table rendering issue caused by invalid dependency refresh

Description

This PR fixes a child table rendering issue in Material Request caused by calling refresh_dependency() on child document rows. Since child document objects do not implement this method, it resulted in the following runtime error:

TypeError: row.refresh_dependency is not a function

Before

Changes

• Removed the invalid row.refresh_dependency() call.
• Replaced row-level dependency refresh with a supported grid refresh mechanism.
• Prevented child table rendering from breaking during form load and field updates.

After

• Child table rows render correctly.
• No console errors are thrown during Material Request load.
• Field dependencies are refreshed using supported Frappe APIs.

Testing

• Verified that existing and new Material Requests load successfully.
• Confirmed that the Items child table renders correctly.
• Confirmed that no row.refresh_dependency is not a function errors are logged in the browser console.
• Verified that field updates and dependencies continue to work as expected.