caused by et2-image href attribute being set to the row-id / vfs-path and causing et2-image click handler to call egw.open_link with the vfs-path as url
overwriting _handleClick now for et2-vfs-mime to only call expose, but never the parent (et2-image) _handleClick, so action-system get a chance to handle it
- new web-components are unconditionally replacing them via the preprocessor
- some widgets (eg. et2_description) could not be removed as other legacy widgets are extending them, but they are no longer registered
- as there are many places using et2_createWidget('description', ...), et2_description returns now web-components for no longer existing widgets
