* add EventListeners in the render() method instead of the constructor
* scrollable widget: add EventListeners in render() method instead of constructor +
... move logic from constructor to render()
* linkcatcher: add EventListeners in render() instead of constructor
* fieldmangler: add EventListeners in render() instead of constructor
* edit-bitmap: initialise editorOperations in render() instead of constructor
* list-widget: initialise storyviews in render() instead of constructor
* vars widget: execute Widget.call(this) in render() instead of constructor
... not shure what this should do
* Update fieldmangler.js
* Update edit-bitmap.js
* Update linkcatcher.js
* Update navigator.js
* Update scrollable.js
* Update list.js
* Update vars.js
In 5.1.5 we switched to using `<$action-setfield>` instead of
`<$fieldmangler>`. The problem was that in the process we lost the
validation of field names, making it possible to create fields with
illegal names
Fixes#1186
Getting rid of the old widget mechanism files finally gives us a payoff
for all the refactoring. Still a bit of tidying up to do, and we need
to re-introduce the animation mechanisms.
