Allow showing rules and background on entire wxListCtrl window

Previously they were both limited to the part occupied by the items
only, add a new method allowing to extend them to the whole client
window area.

See https://github.com/wxWidgets/wxWidgets/pull/2106

interface/wx/listctrl.h

@@ -1333,6 +1333,30 @@ public:
     */
     void CheckItem(long item, bool check);
 
+    /**
+        When the content of state is true, tells listctrl to draw
+        horizontal and vertical rulers on blank rows and also to
+        paint the background of alternate rows on blank rows, using
+        colour to paint the alternate blank(empty) rows' background.
+
+        As EnableAlternateRowColours(), this method can only be used with
+        controls having ::wxLC_REPORT and ::wxLC_VIRTUAL styles.
+
+        This method is NOT available on Windows.
+
+        @param state
+            if @true, draws horizontal rules and vertical rules on empty rows
+            and uses the colour parameter to paint the background of
+            alternate rows when those rows are blank, empty, with no data.
+        @param colour
+            A valid row background colour to enable alternating rows on
+            blank rows (rows with no data).
+
+        @since 3.1.5
+        @note This method is currently NOT implemented in the Windows version.
+    */
+    void SetListRulesAlternateColourOnBlank(const bool state, const wxColour& colour);
+
 protected:
 
     /**