Maintained Spells bar to show > 12 spells

[Splee]

As a Coercer I'm finding it increasingly difficult to keep track of Mez/Stun timers with my Maintained Spell bar as it is. Can anyone make it show more than 12? I've tried editing the XML myself but it just stayed at 12.

With 6 x Breeze, 5 self/group buffs and 1 haste that's 12 right there. That means I don't see my Mez for ages, never mind the dots and stuns.

Anyone here who can solve this will be my hero.