Editors: "Split New Window" --> "Open in New Window"

Change-Id: Icbf27edc8b3d7bd73504b449491f70056220c99f
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
C++: fix Q_CREATOR_RUN macro handling

Moved it from the handleIfDefDirective to the pre-defined macros, so
that #if defined() can also see it.

Task-number: QTCREATORBUG-9322
Change-Id: Icbecad5c885dd2374b559969c99631c3ddc73844
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>