Fix namespace usage such that all classes in shared/qml live in the
Qml namespace, and classes in QmlDesigner plugin in the QmlDesigner
namespace.

This should prevent any symbol clashes until we can finally get rid
of the file dublicates (e.g. QmlDocument).

Look at the token under cursor only if the current character is a brace or a quote.

They were no longer showing e.g. the file name of the diffed file.
Also separate editor id and editor context a bit.

  * Use id() for methods returning a string used to represent
    some type of object.
  * Use displayName() for strings that are meant to be user
    visible.
  * Quieten some warnings while touching the files anyway.
  * Move Factories to their products in the plugins where that
    was not done before.

Reviewed-by: dt

This adds a new "Design" mode that can be used to manipulate qml files
in a visual way. It will only get build if you have the declarativeui
module in Qt.

This is a squashed import from the Bauhaus project. Share & enjoy :)

Done with Roberto Raggi.

In addition, clean up the text editor action handling in the qtscript
plugin.

Rev-by: con

Also move Designer::Internal::FormWindowEditor ->
Designer::FormWindowEditor.

Reviewed-by: erikv

done with Erik Verbruggen

(re-)formatting.

friends.

resolving.