Add new shared folder flag & match flag names for KOE 1.3

Two new shared folder flags are introduced by KOE:

• TrackShareName = 2 - For https://jira.kopano.io/browse/KOE-51
• CalendarReminders = 4 - For https://jira.kopano.io/browse/KOE-12

These flags have no direct impact on Z-Push, but should be available in the Z-Push code for completeness.

The Z-Push flag DeviceManager::FLD_FLAGS_REPLYASUSER is called SendAsOwner in KOE and is actually a better name. The flag should be renamed in Z-Push to match the KOE name.