This fixes weirdness with GNOME.
On a resize, we will schedule a new frame anyway which will commit
the wl_surface for us anyway. If we don't resize, we'll commit
to stay true to the wayland spec.
Much like toplevel configures, xdg decoration configures only take
effect once the xdg shell configure comes through. Also,
let's get rid of some double computations because we unified the code
paths.
This will let us add more stuff later. Also, it's a better spot
to put the bit field outside of the {current, pending} struct as
the bit field doesn't make any sense if it's part of the `current`
values.
This is a partial revert of e359094cff
window->wl.{width, height} and window->wl.current.{width, height}
represent different things. The former represents the actual size of the
egl surface viewport used for terminal rendering. The former represents
the size of the entire window including the CSD (client side decorations).
These numbers should be the same if CSD is disabled.
Alexander Orzechowski