Form Module Improvements - Increase column limit for Radio/Checkbox lists (from 6 to 10)

Problem: Can’t render a full row of 10 options.

Actionables:

• Update max column setting to allow 7–10.

• Ensure responsive wrapping rules for small screens.

• Add visual preview in builder for 1–10 columns.

• Validate accessibility: minimum touch target, contrast, keyboard nav.

Success criteria:

• Admin can set columns up to 10; runtime renders without overflow on desktop/tablet; mobile adapts gracefully.

Context: This proposal is part of the broader storyline AM-I-856