Remove use of deprecated `gdk_keymap_get_default`
Simpler version merged from branch patch-440-remove-gdk_keymap_get_default-2
Remove use of deprecated `gdk_keymap_get_default`
Remove use of deprecated `gdk_keymap_get_default`
Segmentation fault in readbyte (memory_pages.c)
Defensive code added to timer.c, going to close this one now, many thanks for the investigation and the fix here.
Segmentation fault in ula_contend_port_early (peripherals/ula.c)
Closing as a "duplicate" as this has the same root cause as #504.