MGNLDAM-383 introduces a new feature: "Upload & edit" an asset in a dialog, directly from the assets choose-dialog.

In order to support this, the UI required minor adjustments, in particular because the choosedialog IoC container "inherits" from the one of the target app — not subapp (rightfully so):

• make sure fields/factories get components from the choosedialog container (e.g. imageProvider for the DamUploadField).
• pass on the subapp UiContext along, for the dialog to open in.
• listen to {{ContentChangedEvent}}s in choose-dialog to refresh and select item when form-dialog is saved and closed.