Both InfiniSim/main.cpp and SystemTask.cpp periodically called
`lv_task_handler()`. This introduces a race condition, which leads to a
segmentation fault in either the main or the SystemTasks call of
`lv_task_handler()`.
Now `main` only calls the `lv_task_handler()` if the `SystemTask` does
not (while the screen is turned off). We need this for the Simulator,
otherwise the "Screen is OFF" message won't appear, and the right mouse
button won't be recognized to wake up the simulated screen.
Fixes: https://github.com/InfiniTimeOrg/InfiniSim/issues/3
Notifications store the title and the message in the same array,
separated by a `\0`. Add the notification category as title to the
notifications.
Lorem ipsum dolor sit amet, consectetur adipiscing elit,
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Vitae aliquet nec ullamcorper sit amet.
Id aliquet risus feugiat in ante metus dictum at.
Ut porttitor leo a diam sollicitudin.
Ultrices tincidunt arcu non sodales neque sodales ut etiam sit.
Pellentesque dignissim enim sit amet.
Urna nec tincidunt praesent semper feugiat nibh sed pulvinar proin.
Tellus id interdum velit laoreet id donec ultrices tincidunt.
Viverra maecenas accumsan lacus vel facilisis volutpat est velit egestas.
Volutpat consequat mauris nunc congue.
