[Lazarus] fixes_1_8 - DBLookupComboBox broken

[Werner Pamler]

Am 10.01.2018 um 21:57 schrieb Werner Pamler via Lazarus:
> Am 10.01.2018 um 20:21 schrieb Gabor Boros via Lazarus:
>> I don't know. Attached a simple example. With it I can reproduce the 
>> problem on Windows too. So the problem is not Qt specific.
>
> You did not assign a Datasource to the DBLookupCombo. This is where 
> the value picked from the combo is stored to. Without a Datasource I 
> consider the present hehavior to be correct.
>
> Maybe another dev can comment who is more familiar with databases than 
> me.

And I should mention this: The code which I had to merge manually in 
r56990 was the same code which Juha had added in 55911 to 
dblookupcombobox.inc in order to "respect ReadOnly property in 
TDBLookupComboBox and TDBLookupListBox". And a data-aware control which 
is not linked to a DataSource is readonly, isn't it?