This should simplify how some of the code reads, as well as allowing for future
feature additions to be accomplished in a less restrictive manner. The slotmap +
Object enum pattern was kind of like a really bad ecs in a way anyway. Also I
was looking for an excuse to use an ecs.
Satellite will now force Xwayland to always render with the native
display resolution, and just scale surface sizes accordingly. As a result,
applications won't really respect DPI, but this can be adjusted through
the same means as with normal X11.
Part of #28.
Bit of a hacky fix for #12. It seems like the issue is caused by too
many wl_shm_pools being created and then destroyed before being flushed
to the parent compositor. Might negatively impact performance, but most
performant things shouldn't be using wl_shm anyway.
Sometimes, windows will have actually been destroyed before we even
processed the events for it, so if we try to do something like get
properties on windows (as we do whenever a window is mapped) we will get
an error from the X server, but this is fine - we can just ignore this.
Should fix#16, #20, #22, etc.
