Reviewed-by: dt

E.g. "QmlFiles {}" now also monitors subdirectories by default, while
"QmlFiles { paths : ["bla.qml"] } does not.

Task-number: BAUHAUS-503

See c722282c.

Suggested by Erik Verbruggen

Suggested by Erik Verbruggen

* Fill the snapshot with files that could be imported.
* Implement package imports.

* The qmldir file is not parsed yet.

Reviewed-by: Erik Verbruggen

- It's QML, not Qml. But this is only the file format.
- The umbrella term is Quick (or Qt Quick, to be sorted out)

Go to About Plugins and enable/disable plugins from there.

Reviewed-by: mae

Since otherwise we can't forward declare it.

Use a lowercase .qml file found in project tree if no current file is
selected. This way we don't have to disable run controls if there are
some files to execute.

Reviewed-by: kkoehne

Reviewed-by: dt

Task-number: BAUHAUS-396
Reviewed-by: dt

Reviewed-By: con

All files have been renamed from Qml to QDeclarative.
Registration of types is now done in an initializer method.

Moved Qt Designer to open from Design Mode. Also, Design mode is now global,
and created in coreplugin. Other plugins can register themselves to it.

Doing it creates huge delays, because it resolves to a network path.
Also rename FolderNode::setFolderName to FolderNode::setDisplayName,
because that's the name of the property.

Task-number: QTCREATORBUG-695

QmlList has been replaced by QmlListProperty (33eb76f050b45718d87926).

Patch provided by Aaron Kennedy.

Reviewed-by: akennedy

Instead of letting the list of files being a (comma separated) string
it's now a full JavaScript array. E.g.

  paths: ["file1", "file2"]

This unifies it with e.g. the libraryPaths property

Reviewed-by: Kai Koehne

Now it says "Import Existing Project", since this conveys more
accurately what it does with less words. Also adjusted creation of a QML
project based on an existing directory for consistency.

  Seems like I missed some the first time round. Sorry for that!

Unify names to QmlProjectApplicationWizard & QmlProjectImportWizard