Remove the gear toolbar button that opened Settings as a sheet in the
NavigationSplitView sidebar column, and drop the macOS guard hiding
.settings from SidebarMainItem so it can be added to the sidebar and
rendered in the detail column like other items. The dedicated Settings
window (Cmd+,) is unchanged.
Exposes ContinueWatchingView as an opt-in compact tab bar item,
hidden by default. Uses a short "Continue" label since the full
"Continue Watching" string does not fit as a tab bar title.
After disabling home shortcuts on tvOS, Open URL and Remote Control had
no entry point. Add them as configurable sidebar main items. Remote
Control defaults to visible on tvOS; Open URL defaults to hidden on all
platforms.
