Missing IFileDialog features

[miloush]

Tracking issue for features that native API has but WPF does not expose, as I discover them working on the API.

• folder selection OpenFolderDialog #7244 or PickFolders option for OpenFileDialog (minimal) #6374
• client Guid Common file dialogs new properties #7916
• current selection
• default and forced folder Common file dialogs new properties #7916
• ok and cancel button labels File dialog controls #7256
• custom controls File dialog controls #7256
• navigation root Common file dialogs new properties #7916
• support for stream based items (i.e. from connected phone/camera)
• support for URLs without shell downloading them
• item properties for saving

FOS options:

• OverwritePrompt - we use our own logic and message box, might be compatibility concern to switch to native
• StrictFileTypes - we have our own AddExtension that works differently
• AllNonstorageItems
• CreatePrompt - we use our own logic for save dialog only, native flag works on open dialogs only
• ShareAware
• NoReadonlyReturn - can only be enabled on open file dialog, cannot be disabled on save file dialog, use FileOk handler
• NoTestFileCreate Common file dialogs new properties #7916
• HidePinnedPlaces - removes everything in the navigation pane
• OkButtonNeedsInteraction
• DontAddToRecent Common file dialogs new properties #7916
• ForceShowHidden Common file dialogs new properties #7916
• DefaultNoMinimode - enforced by WPF
• ForcePreviewPaneOn Common file dialogs new properties #7916
• SupportsStreamableItems

Events:

• FolderChange
• FolderChanging
• Overwrite - we use or own logic for overwrite prompt
• SelectionChange
• ShareViolation
• TypeChange