What is the enhancement in mind? How should it look and feel?

An option to choose how to count standby, tentative, and accepted players.

Please provide any additional information below.

Currently tentative players are counted in the ( ) for the role count in the bottom of the window.  The way I manage raids, tentative players don't get spots unless they accept by the day of raid.  Accepted players are also not guaranteed to go.  Only confirmed players have for sure spots.  I am sure there are guild out there that use variations of calendar rules.
It would be nice to have in the settings some pull down menus next to invite statuses.  Have the user chose if tentative means the are part of the Attendees, Standby or ignored all together.
Confirmed seems like it should default to Attendee and doesn't really need an option.
Standby should default to Standby and doesn't need an option.
Declined should default to being ignored in the counts and doesn't need an option.
I honestly don't even know what the intent of "Out" is.
I tried to find where these values are created in the lua files and make changes for my own use but I cannot find them.  I find references to variables scattered all over.  Being relatively new to lua I just can't make sense of the code.