On compositors that support compositor key repeat events, use those, for
complete robustness. Sadly no actual compositor implements these yet.
Otherwise use a timer fd/pipe to queue the repeat events and only
dispatch them after events from the compositor are handled. This means
release events from the compositor will prevent spurious repeat events.
One can, in the worst case lose some repeat events if there is a very
large interval between the start of the timer and the next poll, but
that is unavoidable and is why repeat events should come from the compositor
in the first place.
Fixes#9224
The time is stored in a signed 64 bit integer with nanosecond accuracy. This eliminates the possibility of floating-point inaccuracies.
`monotonic_t` can currently hold values large enough to work correctly for more than 200 years into the future.
Using a typedef instead of directly using `int64_t` everywhere will also allow easily changing the datatype in the future should the need arise for more precise or bigger time values.
Also reduce input latency by ignoring repaint_delay when
there is actual pending input.
Gets rid of request_tick_callback(). Now empty events
result in the tick callback being called so there is only a
single mechanism for waking up the main loop and getting
the tick callback called.
