Popovers don't support theming

[Satyajit Sahoo]

The background color and the text color of the popovers (except Slingshot) don't respect the theme.

[Danielle Foré (danrabbit)]

This is definitely invalid for Granite. Granite's popovers are theme-able.

[Sergey "Shnatsel" Davidoff (shnatsel)]

I can confirm it for Wingpanel under Ambiance; it does use some theme preferences but not all of them, which leads to unreadable text.

[Cassidy James Blaede (cassidyjames)]

Confirming with ambiance and a handful of other themes. We should definitely have it use theme colors. Right now it pretty much only works in eGTK which isn't nice when we can and should support standard theming.

[Satyajit Sahoo (satyajit-happy)]

Also, I forgot to mention, why it inherits styles from standard menu class? It doesn't look like a normal menu.

The problem is, if I specify a border or inset shadow in the menu, then it appears in the popover, which would have been ok if it fitted the nice rounded shape of the popover. But the shape of the shadow is a rectangle, like a menu, and not the same as the shape of the popover.

P.S. - Inset shadows are supported in the built-in engine and Adwaita engine.

[Danielle Foré (danrabbit)]

Lucas just committed a fix that should have them more-or-less follow the menu style.

[Satyajit Sahoo (satyajit-happy)]

The bug is not fixed. Also they cannot be themed in GTK 3.8.

[Satyajit Sahoo (satyajit-happy)]

#6 is the inset box shadow issue I mentioned in #4