generalize NavigateToFileWindow: Now becomes NavigatorWindow
formatting style for CodeEditor: no spaces before parenthesis and _lowerCamelCase fields
copy and paste
Merge branch 'master' of https://github.com/Unity-Technologies/CodeEditor
Use composition container instead of explicit construction
Rename INavigatorWindowItemProvider => INavigateToItemProvider
Added NavigateToItemProviderAggregator and test
code gardening
CodeEditor.Text.UI.Tests depends on CodeEditor.Testing
simplify CodeEditorWindow.TextViewFactory