[Lazarus] DBNavigator: why is the refresh button enabled only if the dataset is modifiable?

[Luca Olivetti]

In lcl/include/dbcustomnavigator.inc, method 
TDBCustomNavigator.EditingChanged

CanModify:=Enabled and FDataLink.Active and FDataLink.DataSet.CanModify;
...
Buttons[nbRefresh].Enabled:=CanModify;



Why?

I mean, I have a read only query (specifically a TZReadOnlyQuery) since 
I only want to show the data, but another application can change it, 
hence a refresh could be needed.

Bye
-- 
Luca Olivetti
Wetron Automation Technology http://www.wetron.es/
Tel. +34 93 5883004 (Ext.3010)  Fax +34 93 5883007