* UI: Add help buttons to "New Online/Offline"
- Add help button to both dialogs linking to docs.abapgit.org
- Clicking the button brings up the documentation inside the GUI HTML viewer
- Enhancement to `zcl_abapgit_gui` and `zcl_abapgit_html_viewer_gui` to properly handle 'Back' when navigating through Internet pages
* Open help in external browser
Co-authored-by: Lars Hvam <larshp@hotmail.com>