* 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
* 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.
