[notification_server] use close button from Web+

[diver]

​http://webpositive.haiku-os.org/browser/webkit/trunk/WebKit/haiku/WebPositive/tabview/TabManager.cpp?rev=580#L619

​http://cgit.haiku-os.org/haiku/tree/src/servers/notification/AppGroupView.cpp#n80

[X512]

I think that remove cross button in all cases is a better solution :) Cross for Windows and rectangle for Haiku. See BeZilla.

[pulkomandy]

Done in hrev44765.

Using a rectangle does not make it clear that it is a "close" button, so I'd rather avoid it ?

[diver]

There is a regression, though: Label in AppGroupView appears 2 pixels higher than before:

While I'm at it I'd like to propose some improvements:

1. Move label 2 pixels lower as it was before
2. Add pressed state to close widget.
3. Don't show 2 close buttons in case of a single notification.
4. Change AppGroupView height to match Deskbar leaf button height

[leavengood]

+1 to diver's last mockup.

[axeld]

You know, flat is modern nowadays ;-)

[leavengood]

A real screenshot of experimental changes

[leavengood]

I have started working on implementing diver's mock-up, and here is what it looks like:

What do you think diver?

[leavengood]

Take ownership.

[leavengood]

OK, this has been committed in hrev45349.