The ibus-keyman post-installation script failed, causing the entire
installation to fail. This change removes `set -e` so that we try
to run the rest of the commands even when one command should fail.
Also accounts for ibus-daemon being started with the full path,
and start ibus-daemon with fill path as well.
This change deals with restarting ibus in the post-install script.
Also, on Ubuntu 21.10 Impish there are two `ibus-daemon` processes
running for the current user. One of them has the `--xim` flag
and is the one we care about. This change improves the detection
that ibus is running in the post installation script.
