fixed bug 15530: build failure int-dbcons-oracle 671. Related to bug 15523

[ModelObject] Set classinfo for 2.50 wad windows not based on db

[OBCQL] Fixed reference_id of rowsNumber parameter of Invoices to pay widget.

[fl] Small improvement on field positioning

[OBCQL] Changed widths and references of example query's columns.

[OBSERDS] Changed file name of the exported data to ExportedData.csv

[OBCQL] Remove unneeded OB_HasLink property.

[fl] Implemented form layout
- Field positioning is based on the number of column to be use and the flags:
issameline, startinoddcolumn
- If the column is an even one and the field has not issameline or is marked
as startinoddcolumn a spacer in appended to move the field to an odd column
- The number of columns used by a field (colspan) is based on the reference or
the displaylength. Text fields, or String fields with more than 60
characters wide, use 2 columns.
- Text columns use 2 rows (rowspan)

[cleanup] Fixed autosave

Fixes issue 15165. Prefix and suffix also removed