ConsoleDialog/Wrapper: added support for askHidden (eg passwords)

git-svn-id: svn://svn.appwork.org/utils@2135 21714237-3853-44ef-a1f0-ef8f03a7d1fe
ImageProvider: fixed toImageIcon to work on headless

git-svn-id: svn://svn.appwork.org/utils@2136 21714237-3853-44ef-a1f0-ef8f03a7d1fe
git-svn-id: svn://svn.appwork.org/utils@2137 21714237-3853-44ef-a1f0-ef8f03a7d1fe