[Lazarus] RE : @DBLookupControls users: call for test

[Ludo Brands]

> 
> In order to fix some bugs i did significant changes in 
> TDBLookup[List|Combo]Box controls
> 
> I did a lot of testing but may broken something
> 
> Please report problems you have
> 

Hit another regression: open TDBLookupComboBox click on current value:
record is marked as modified (Post called when cursor moved, etc). Before
the changes, the record was updated only when the value changed.

Ludo