DisplayDeviceLocation rework

[williambohrmann3]

Description

The aim of this PR is to improve the sample based on lessons learned when writing the corresponding tutorial.

• Adds detailed comments
• MAUI: only subscribe to LocationDisplay.AutoPanModeChanged event once
• Standardizes basemaps on all samples
• Defaults to auto pan mode off in combo box when first loading sample
• Start and stop the location data source for better error handling and more accurate button text
• Updates screenshots

Type of change

• Bug fix

Platforms tested on

• WPF .NET 6
• WPF Framework
• WinUI
• MAUI WinUI
• MAUI Android
• MAUI iOS
• MAUI MacCatalyst

Checklist

• Self-review of changes
• All changes work as expected on all affected platforms
• There are no warnings related to changes
• Code is commented and follows .NET conventions and standards
• Codemaid and XAML styler extensions have been run on every changed file
• No unrelated changes have been made to any other code or project files
• Screenshots are correct size and display in description tab (800 x 600 on Windows, MAUI mobile platforms use the MAUI Windows screenshot)