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This notifies the views if the instance has be really instanced.

Task-number: QTCREATORBUG-3323
Reviewed-by: Tobias Hunger

This is a woukround and should be fixed later.

Reviewed-by: Roberto Raggi

Task-number: QTCREATORBUG-1785

Avoid issues with QXmlStream* classes on Mac.

Reviewed-by: con

 * Remove unnecessary member variable.

Some renaming and cleanup.

Also, remove the import path of the Qt that Creator was built with. It
might make things seem to work on built-from-source Creators that will
fail when Creator is shipped.

Reviewed-by: Erik Verbruggen

fixes crash on shutdown

Order matters.

Reviewed-By: Thomas Hartmann

Let the collection itself be the singleton.

Instead of in one XML embedded as a resource, now builtin
snippets can be specified on any XML distributed under share.

Groups are no longer enum values but identified from snippet providers.

Since in the snippets overlay the selections are created with
ExpandBegin the interest is mostly in detecting when the first one
moved to the left (for example, when an undo is performed right
after inserting the snippet). However, this tracking doesn't need
to necessarily be associated with that flag.

- Restored removed built-in snippets.
- Revert a built-in snippet.
- Reset the snippets collection.

Reloading and synchronizing are now directly accessible from
the collection interface.

And mark the completion item as a snippet.

When editing one variable from a code snippet, all other variables
with the same name are updated accordingly.

Provide an interface so users can create/edit/remove snippets.

This avoids flickering, since parentChanged now
comes after property changed.

We select now after the drop event.
Some fixes for the out of process stuff.

Task-number: QTCREATORBUG-3242

Add USB protocol and chunking.

The mainFile property of QmlProject is the default file to run. People
have still the opportunity to override this in their run settings,
though.

The wizard generated code was updated accordingly. Note that this makes
projects generated by the wizard incompatible with QtCreator 2.1!

Task-number: QTCREATORBUG-3249