Resolve "combobox inside multi-value data load bug" (UIB-2)

Majkirequested to merge
440-combobox-inside-multi-value-data-load-bug-UIB-2 into uibuilder-2

Fixes #440 (closed) for uibuilder-2

The issue has been resolved with fixing a premature selection handling bug in uibuilder combobox.

Merge request reports