Add textToDisplayForNullSet attr to KexiView, add this:visibleObjectNameProperty/this:objectNameReadOnly meta properties
- this:visibleObjectNameProperty" property of type string specified name of property that contains "object name" to display; replaces this:useCaptionAsObjectName
- this:objectNameReadOnly property of type boolean makes the object name box read-only for the user
- add KexiPropertyPaneLineEdit::setReadOnly, KexiObjectInfoWidget::setObjectNameReadOnly, rename setObjectVisible to setObjectNameVisible
- KexiObjectInfoWidget: remove focus for the labels, set only clickFocus for the name box, disable clearing and focus for read-only name box
- add textToDisplayForNullSet attr to KexiView so it can be used by KexiMainWindow when assigning property set
- to achieve the above: let the property pane change property set of the prop editor, not signals (needed because the property pane has no access to the KexiWindow/KexiView API)
- now the textToDisplayForNullSet param is not needed in updatePropertyEditorInfoLabel()
- Set custom textToDisplayForNullSet for table/query designers