View source for Calligra/Making libs independent of QWidget

== Problem ==

Right now some parts of the Calligra libs are dependent on QWidget and its subclasses, making it difficult to use in UIs which don't use QWidget. An example can be a QML based UI.

=== Places where this dependency is present ===

* Shape
* Tool/ConfigWidget - A tool uses a configwidget which is a QWidget which finally sits in a dock

=== Possible solution ===

* Separate Shape and Tool, make Tool independent of QWidget and let it contain only logic. A platform specific Tool then inherits the Abstract Tool to provide UI to the Tool on that platform.

* In separating Shape and Tool, let Shape expose some Actions which the Tool can use to interact with it.

* In the long run, we would also want something like the following-
 calligra
         /engine
                /words
                /stage
                 ....
         /ui
                /active
                /desktop