WindowState is a bitfield that can represent maximized, full screen
and hidden window states.
WindowState is passed along with resize events, improving on the
prior basic is_full_screen boolean by representing the other states.
Notably, WindowState::MAXIMIZED is used to represent a state where
the window's size is constrained by some window environment function;
it could be due to the window being maximized in either or both the
vertical or horizontal directions, or by the window being in a tiled
state on any edge.
When the window is MAXIMIZED, wezterm will behave as though
`adjust_window_size_when_changing_font_size = false` because it knows
that it cannot adjust the window size in that state.
This potentially helps with #695, depending on whether the window
manager propagates this state information to wezterm. Gnome/mutter
does a good job at this with both X11 and Wayland, but I couldn't get
sway to report these states and I don't know of any other tiling wm
that I can easily install and use on fedora, so there's a question
mark around that.
This commit causes a window-config-reloaded event to trigger
when the appearance (dark/light mode) is changed on macos.
It also arranges to propagate the window level config to newly
spawned panes and tabs, created both via the gui and via the
CLI/mux interface.
refs: https://github.com/wez/wezterm/issues/894
refs: https://github.com/wez/wezterm/issues/806
