The vacation setting was managed by the admin user only. And this setting will be used throughout the whole plugin system.
Following some adjustments:
Vacation allocation: Days amount for allocation per year.
Allow accumulating: Checked this will allow the system can add the number of remaining days from last to the current year. And Accumulated will appears to set a maximum amount of days the system can add.
Special allocation: Create some special allocation and assign it to someone.
Vacation type: Manage and create vacation type. The user can see all types in vacation request creating.
