[Adam1213]

This PR changes how Settings class works with WPF. Settings is now a singleton instead of static class and properties change using bindings instead of events. Setting switches got reworked to deduplicate code and ease style changes.

From other changes:

• Onedrive account redaction is now completely merged with username redaction.
• Edited how Onedrive account is redacted, without need of exception handling and calling method again
• Slight style changes like lower margins for settings switches, bolder font.
• EnableDebug setting is now a property, with extra logic to exclude it from debug logs

May conflict with #114

[Adam1213]

Also noting #116 , hack to serialize static class will no longer be needed.

[zleyyij]

@Adam1213 could you fix the merge conflict?

If you're busy, I can try my best.