* instead of breaking encapsulation of PropertyItem apply the attorney idiom
* refactoring of PropertyItemDelegate::createEditor by moving the code to PropertyItem::createPropertyEditorWidget
* Gui: fix PropertyView 'Add property' action
* Gui: fix property view font color for linked property
* Gui: improve PropertyEditor refresh
* Gui: show real property name in property view tool tip
* Gui: improve property view tool tip
* Gui: fix auto recompute in property view
* Gui: remove duplicated PropertyModel signal of dataChanged()
* Gui: fix property view update on property change
Including changes in document properties
* Gui: fix transaction closing on property editor change
On editing row removal and on model reset.
* Gui: fix property view auto expansion of previous selected item
* Gui: improve property editor navigation using tab/shift+tab
Crash stack trace
https://forum.freecadweb.org/viewtopic.php?f=8&t=37757&e=1&view=unread#p327901
It appears to by caused by handling QAbstractItemDelegate::closeEditor
signal twice. Once inside PropertyItemDelegate::editorClosed via slot
connection where the editor is closed/destroyed, the other in
PropertyEditor::closeEditor() which tries to access the destroyed
editor.
This patch removes handling of closeEditor signal in
PropertyItemDelegate.
* Display property from linked object, colored green,
* Change DlgPropertyLink to support external linking and sub-object
selection
* Improve large selection performance by using a timer
* Improve TAB key behavior in property editor
* Add context menu to show hidden properties, change property status,
set expression on any and property, and add/remove dynamic properties
* Optimize expression completer model construction, as the original
implementation gets prohibitively slow for moderate number of objects.
