* use system chrome instead of custom caption button on macOS
* move `BeginMoveWindow` and `MaximizeOrRestoreWindow` to `ChromelessWindow`
* better supports for fullscreen mode on macOS
* redesign the layout of title bar for all windows
Signed-off-by: leo <longshuang@msn.cn>
* Added a checkbox in the LFSLocks window to only show the ones locked by "Mat"
* Waits for the locks list to finish loading before making the checkbox clickable
* Now uses correct username for lock filtering.
WIP: needs an error popup if user is misconfigured
* Added an error popup if username is empty on lfs locks
* Replaced an IEnumerable with a AvaloniaList for consistency
* move resources and styles for macOS caption button to `CaptionButtonsMacOS` because it is never used by others and should not been changed
* add `IsCloseButtonOnly` property to `CaptionButtons` and `CaptionButtonsMacOS` and replace the controls in windows
