Add additional Vault tabs

[SXTC]

Right now we have 3 vault tabs but this causes some problems:

- Due to some people robbing vaults I have to denie access to all newcommers, discriminating everyone just because of the bad behavior of some.

- Due to some items being "crew" related in how this FC operates as a team, I had to lock one of the vaults for crew purposes.

This means that all other ranks only have use for 2 vault tabs that get filled up easily.
And newcommers don't have a vault at all due not not being able to risk putting good stuff in the first vault.

At the same time I think its silly you can make up to 10+ ranks while never getting more then 3 vault tabs to share between them.
This causes a great issue in the more populated FC's (in my case where the goal is 200-250)

I therefor suggest that SE gives us an additional vaulttab for every FC rank we create.
In my case 6 membersranks and 3 crewranks (counting the leader). So that should make 9 vaulttabs. That way the vault can be shared in a more efficient manner and you will end up actually supporting your FC and rewarding your members for their dedication when they attempt to rise in rank (it feels more rewarding at the same time). But we all know you can hardly fit any material in there to be of use, I think the vault inventory should increase drastically. At the very least, to make this work we would need a minimum of 5 vault tabs.