We do not want to depend on uterm just for the modifiers so introduce new
modifier-names which are in-sync with the UTERM names.
Inside of kmscon we still use the UTERM names everywhere, but inside of
TSM we now rely on the new names.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Instead of accessing kmscon-state we now add a helper to select the
palette and make the terminal-subsystem use it on initialization.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
