#17 Main window with docks improvement

[Alex Chmykhalo]

Example for working with docks here in Qt documentation: http://qt-project.org/doc/qt-5/qtwidgets-mainwindows-mainwindow-example.html. Currently (from all functionality shown in the example) we need only menu that turns on and off different docks visibility.

Please use following interface headers for implementation of main windows with docks (see headers in the attachment).

Please, inherit GenericDockWidget class and create 5 different docks described in guidefs.h