/* ArdourWindows are not dialogs (they have no "OK" or "Close" button) but
they should be considered part of the same "window level" as a dialog. This
works on X11 and Quartz, in that:
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+
(a) utility & dialog windows are considered to be part of the same level
(b) they will float above normal windows without any particular effort
(c) present()-ing them will make a utility float over a dialog or