[GNC] Customizing appearance of parent accounts only in Accounts tree

[Adrien Monteleone]

For completeness, in case anyone is wondering and knows about the 
ability to use CSS to alter UI appearance:

No, the contents of the Accounts Tab cannot be targeted by CSS. That 
area of the window is a GtkTreeView where none of the items within it 
are exposed for styling rules. You can target the entire tree possibly, 
but not individual elements within it. At least not at present.

Regards,
Adrien