Add predefined quota on mailbox creation page

[o-m-d]

Filling Quota on mailbox creation page with value, defined in $CONF['mailbox_default_quota'].
It's useful for creating mailboxes with same quota.
When $CONF['mailbox_default_quota'] is empty (by default), mailbox creation page works as before - with empty Quota.

[cboltz]

I agree that the quota field should be pre-filled (actually I wonder why it isn't and would call that a regression).

However, I don't agree with introducing a new config option for this - we already have enough config options ;-) and this isn't a case of "one size fits all [domains]". Maybe using the maximum allowed quota as default.would make sense? Typical users don't want less anyway ;-)

Hint: updateMaxquota() updates the description text with the maximum allowed quota, also updating the default there should be easy.

[o-m-d]

In some cases (eg on VPS or outdated hardware (sad but true)) mail admins don't want grant max quota to all mailboxes, and also want pre-filled some quota at every mailbox creation. In that cases I'm apply this patch manually.

I'm agree - one size to all domains not best solution. Maybe better add this as per-domain option, like a maxquota option? But it's requires more time.

[lelutin]

per-mailbox max quota would be a good value to pre-fill the field with imho. if I understand correctly there is already this value available, either as the default per-mailbox setting in $CONF['maxquota'], or set per-domain (probably in the database)