The user should be able to hide the Navigate control in map

[speleoluc]

Describe the idea (required)

When paddling, route navigation makes little sense, but I still get an icon I may stumble upon through a waterproof case or with water drops causing taps. I wish I could hide this useless control.

Tell us about the expected behaviour (required)

The Navigation icon should be optional.

Tell us about alternatives you've considered (required)

None. I quickly exit the Navigation dialog when I open it by mistake.

Context (optional)

No response

[scaidermern]

Related to #6770.