[BUG #7710] Prototype of website unified widget set.
[BUG #7710] Use explicit class for qxWeb initialization.
[BUG #7710] Fix inline apps
[BUG #7710] Added button prototype.
[BUG #7710] Make sure to create the right collection instance for buttons e.g.
[BUG #7710] Added qxWeb image widget
[BUG #7710] Added enabled support for the button.
[BUG #7710] Clean up constructors of all widgets
[BUG #7710] Added a Rating widget prototype.
[BUG #7710] Added a slider widget prototype.