CFTypeRefs may not always contain valid pointers, so they must not be
stored in pointer types lest the Go runtime treats them as such.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
The app and app/internal/wm packages are tightly coupled, requiring
quite a bit of forwarding types, values and constants from the internal
package to export it. Further, no other package imports package wm.
This change merges the two packages.
While here, drop the pre-Go 1.14 SIGPIPE workaround.
Signed-off-by: Elias Naur <mail@eliasnaur.com>