PeopleProxy : updates filterAcceptsRow() with userSelectionModel()
PeopleProxy : updates filterAcceptsRow() with userSelectionModel()

- Since we don't use selectedAccount for the same purpose anymore,
we need to remove their calls.

- filters the rows returned by filterAcceptsRow() with the new
userSelectionModel.

Change-Id: Ibd9732236118e5556ff806ed17d36de78ae290d0
Reviewed-by: Stepan Salenikovich <bebb1f1b8bb7363930c4153df8cb235b803d485d@savoirfairelinux.com>

savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc