AceConfig-3.0 Options: Button with empty name and tooltip?

[LudiusMaximus]

I am using the AceConfig-3.0 Options button with a custom image. The image should be self-explanatory so I do not want to clutter up the UI with an extra text below it. This can be achieved by setting name to "". But then, I am getting not tooltip any more. If I set name to " ", I get the tooltip but with a blank line on top.

type = "execute",
name = "This should just be the tooltip header, but not below the button image.",
image = "Interface\\Transmogrify\\Transmogrify",
imageCoords = {0.533203125, 0.58203125, 0.248046875, 0.294921875},
imageWidth = 25,
imageHeight = 24,
desc = "Some explanatory tooltip text...",

Ideally, a text would still be shown as the golden tootlip header, but not in the UI below the button image. Is there a way to achieve this?

I started looking into what a "custom widget" might be but did not get very far.