Load todo items on startup

Reload (and show) items into the list box after reading data files.

Reported-by: BARE Willy sprl <barewillysprl@euphonynet.be>
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
Do not highlight items on inactive windows

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
Release 3.2.1

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>