Create new Object nInput_RaidSessionsCount

[abrizida]

Create a new Input object that displays the number of RAID sessions by user,
the total of active sessions and also the sessions peak.

The idea is to have a quick way of knowing if we have to many RAID sessions open and also how many for a specific user.

[nmaguiar]

Thinking about it, instead of creating a new input I believe it would make more sense to just add additional arguments to the existing nInput_Sessions plug to switch between the current “detailed” list of sessions and an “aggregated” mode (with active sessions and sessions peak). Do you agree?