Reviewed-by: Roberto Raggi

Should have been part of 9aaf2ec8

Reviewed-by: dt
Reviewed: erikv, con

The run configuration id changed, leaving restored qmlproject without
any run configuration.

Reviewed-by: kkoehne

Only watch directories, and not single files. Also, share one
FileSystemWatcher between projects & FileFilter items.

This fixes the issue that the process runs out of file handles e.g.
when loading a .qmlproject file containing all of qt examples & demos.

Basic implementation of FileSystemWatcher was copied from
ProjectExplorer::FileWatcher - however the FileWatcher is only
for files (and not directories), and also monitors the last
change date etc.

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