It is currently not possible to open Dialogs outside of an app, e.g. from the shell.
We have to:

• use UiContext instead of subAppContext in FieldFactories and Fields
• map UiContext to ShellImpl on admininterface scope to guarantee there is a UiContext accessible
• move components mapping where necessary

components mapping changes:

• move imageprovider to admincentral scope. there is no other implementation so far.
• move simple mappings like DialogView FormDialogView which are scope independent to admincentral
• FormDialogPresenter needs to be present in all scopes to ensure it gets the right uiContext injected
• copy *FactoryFactory mappings to admincentral. As they are using the componentProvider they will remain in app scope to not introduce unwanted sideeffects