Extract the viewer proxy from the SortedActListViewer

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Family viewer : cosmetic

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Family viewer: fix minor build warning

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
ActEntry: by default, use the default value from the ActField

Signed-off-by: Jerome Flesch <jflesch@gmail.com>