API: Rename ObjectAclOperation to AccessControlOperation

[ChangeLog][API] Renamed ObjectAclOperation to AccessControlOperation

Change-Id: I5490bae6790e69384d2a3de60962071525630ffe
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Remove const from signals

Change-Id: Id52306da8a7034f807f83322a9c5150d4d97df3a
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Move Q_PROPERTY to the Q_OBJECT macro for consistency

Change-Id: I9e0fd718711bbc802880a9a50004c51e19e29d48
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>