Restore accidentally removed EVT_GRID_CMD_RANGE_SELECT macro

This was removed in 415f080c80 (Split wxGrid RANGE_SELECT event into
SELECTING and SELECTED, 2020-07-27) without preserving it for
compatibility. Do define it now, just as it was done for the non-CMD
equivalent of this macro EVT_GRID_RANGE_SELECT.

Also update the documentation to fix a typo from e2f316b19d (Mention
that wxEVT_GRID_RANGE_SELECT{ED,ING} are new in 3.1.5, 2020-08-18).

include/wx/generic/grid.h

@@ -3525,6 +3525,7 @@ typedef void (wxEvtHandler::*wxGridEditorCreatedEventFunction)(wxGridEditorCreat
 #if WXWIN_COMPATIBILITY_3_0
     #define wxEVT_GRID_RANGE_SELECT wxEVT_GRID_RANGE_SELECTED
 
+    #define EVT_GRID_CMD_RANGE_SELECT EVT_GRID_CMD_RANGE_SELECTED
     #define EVT_GRID_RANGE_SELECT EVT_GRID_RANGE_SELECTED
 #endif // WXWIN_COMPATIBILITY_3_0
 

interface/wx/grid.h

@@ -6398,7 +6398,7 @@ public:
         The user selected a group of contiguous cells; variant taking a window
         identifier. Processes a @c wxEVT_GRID_RANGE_SELECTED event type.
         This event is available in wxWidgets 3.1.5 and later only and was
-        called @c wxEVT_GRID_RANGE_SELECT in the previous versions.
+        called @c wxEVT_GRID_CMD_RANGE_SELECT in the previous versions.
     @endEventTable
 
     @library{wxcore}