Fix Mapillary parent/child photo overlay toggling

[krishnan05]

Problem

The Mapillary Data panel violates expected parent/child toggle behavior (#11671).
Disabling the Mapillary master checkbox does not disable its subordinate overlays, leading to an inconsistent and confusing UI state.

Screenshots

Before
Parent Mapillary toggle disabled, but child overlays remain enabled:

After
Disabling the Mapillary parent toggle correctly disables all child overlays:

Solution

This change enforces correct parent/child toggle logic for Mapillary overlays:

• Disabling the Mapillary parent checkbox now disables all Mapillary child overlays.
• Enabling or disabling child overlays updates the parent checkbox state accordingly.
• Child overlays remain independently configurable when the parent is enabled.

Scope

• UI logic only (Photo Overlays / Mapillary section)
• No changes to rendering, data loading, or Mapillary integration

Testing

• Toggled Mapillary parent checkbox on/off
• Verified all Mapillary child overlays follow parent state
• Verified parent state updates when child overlays are toggled individually

Fixes #11671

[tordans]

This is not #11671 (comment) is it?

[krishnan05]

This is not #11671 (comment) is it?

You’re right — this PR addresses only the parent/child toggle logic issue described in #11671, not the broader UI restructuring discussed later in the thread.

The goal here was to fix the inconsistent “master switch” behavior without changing the existing panel structure. The broader questions around how photo and detection providers are grouped and presented go beyond a simple bug fix and likely need a more deliberate UX and architectural discussion, including panel structure and state ownership.

It may be useful to discuss possible directions or scope this into follow-up work, depending on what maintainers think makes the most sense.