[KRDB] Also try wildcard tooltip
It seems as though only tooltip background color was honored whereas text stayed at whatever default window text there was,
leading to potentially unreadable text.
BUG: 355540
FIXED-IN: 5.12.8
CHANGELOG: Fixed incorrect tooltip colors applied to GTK2 applications leading to unreadable text
Differential Revision: https://phabricator.kde.org/D18482