Ability to apply custom CSS theming to WorkBox

Hello!

I'v hit the wall with workbox notification miniview. There seems to be no way to edit the colors of the miniview.

Custom.css doesn't seem to effect the insides of the iFrame. I'v also noticed that there is bundled css files with the plugin, but there is no way to edit/override the css styles.

Blue colors doesn't really fit in with our color scheme.

css styles that I would want to edit:
#mw-container .mw-notification-item.focused
#mw-container a
#mw-container .mw-drilldown-list.focused
#mw-container .mw-drilldown-item .mw-drilldown-excerpt

it would be nice if there were a color picker in the Confluence Admin console to these items. Or custom css that could be edited.

Cheers
-Patrick