Document wxUSE_DPI_AWARE_MANIFEST option

docs/doxygen/mainpages/const_wxusedef.h

@@ -322,6 +322,8 @@ library:
 @itemdef{wxUSE_DATEPICKCTRL_GENERIC, Use generic wxDatePickerCtrl implementation in addition to the native one.}
 @itemdef{wxUSE_DC_CACHEING, cache temporary wxDC objects.}
 @itemdef{wxUSE_DDE_FOR_IPC, See wx/ipc.h file.}
+@itemdef{wxUSE_DPI_AWARE_MANIFEST, Set the DPI awareness of the application
+(0=none, 1=system, 2=per-monitor. Used by CMake and when wxUSE_RC_MANIFEST is enabled.}
 @itemdef{wxUSE_ENH_METAFILE, Use wxEnhMetaFile.}
 @itemdef{wxUSE_HOTKEY, Use wxWindow::RegisterHotKey() and wxWindow::UnregisterHotKey}
 @itemdef{wxUSE_INKEDIT, Use InkEdit library. Related to Tablet PCs.}