Tooltip location top by default

Hi,

In my CSS theme files in C:\Program Files\Inductive Automation\Ignition\data\modules\com.inductiveautomation.perspective\themes.
I would like to have all my tooltips in location: top by default. I've tried
this in my main theme file :

.psc-tooltip {
    position: top;
}

and this in palette/tooltip.css :

.ia_componentTooltip {
    position:top;
}

No one works :slightly_frowning_face: