Shared code and inline documentation update
FieldLogViewer: Fixed rare crash when using a quick filter
Inline documentation mentions limited availability for NET20 build
Scope helper parameter values; Scope and Timer helpers for Action/Func

* Scope helper accepts parameter values
* New scope and timer helpers for Action und Func delegates up to 2 parameters
* Data item formats structured values like JSON
Added WPF Dispatcher log methods (text message and custom timer)
Added WPF TraceSource listeners (DataBinding etc.)