Fix setting wxPG_ARRAY_DELIMITER attribute

This attribute is used only to set internal data member in wxArrayStringProperty and thus can be considered as a built-in attribute which doesn't have to be stored in the property's attribute store.

interface/wx/propgrid/property.h

@@ -164,9 +164,9 @@ struct wxPGPaintData
 #define wxPG_DIR_DIALOG_MESSAGE             wxS("DialogMessage")
 
 /**
-    wxArrayStringProperty's string delimiter character. If this is a quotation
+    Built-in attribute to set wxArrayStringProperty's string delimiter
-    mark or hyphen, then strings will be quoted instead (with given
+    character. If this is a quotation mark or hyphen, then strings
-    character).
+    will be quoted instead (with given character).
 
     Default delimiter is quotation mark.
 */

src/propgrid/props.cpp

@@ -2923,9 +2923,9 @@ bool wxArrayStringProperty::DoSetAttribute( const wxString& name, wxVariant& val
     {
         m_delimiter = value.GetChar();
         GenerateValueAsString();
-        return false;
+        return true;
     }
-    return true;
+    return false;
 }
 
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