feat(io): reader/writer should rely on properties for file / folder selection from xml

Description

Base reader and writer has been improved to support <file>, <folder>, <resource> and windowTitle XML configuration as files, folder, resources and window_title properties. The XML configuration has been deprecated (but kept) and a unit test was added. Readers and writers that used the windowTitle configuration (mainly by defining a different "default"), were updated to use window_title property. This implies passing the class "default" to the super constructor.

Breaking change(s)

window_title property required a slight change in the API: using the super constructor for the class default and use *m_window_title to access the property when calling open_location_dialog().

How to test it?

Launch the unit tests and test readers/writers in applications (sight_viewer..)

Decreased code coverage

If you reduce test coverage, it is mandatory to justify it here

Related issue(s)

Closes #1345 (closed)