Fix 'Run CMake' button text.

It raises a dialog, so it needs an ellipsis.

Change-Id: Ifb668e7a4419c6eaba080b99e64e57cb9730e071
Reviewed-by: Tobias Nätterlund <tobias.naetterlund@kdab.com>
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Nicolas Arnaud-Cormos <nicolas@kdab.com>