Allow keyboard shortcuts to be disabled

What does this MR do?

MVC to disable keyboard shortcuts

Adds 'Keyboard Shortcuts' help menu to toggle modal Store 'shortcutsDisabled' in localStorage

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers

Loosely related followup issue due to #37958 (closed)

Closes #22113 (closed)