NoteCase Pro v4.8.0 desktop edition released

Minor release again, mostly released to fix the "Check for updates" feature errors due to changing the web hosting provider. Additionally, as announced a long time ago, audio (gstreamer) support was removed.

Additional fixes:
- major: as announced a while ago, support for audio operations (recording, playing) has been removed, this code had issues due to uneven Gstreamer support over platforms (v 0.1 vs 1.0; lack of quality recording codecs on Windows, huge distribution size with Gstreamer bundled on Windows/Mac
- fix: "Check for Update" stopped working in June after changing hosting provider (https protocol is now required instead of http)
- fix: Lua method Nc_GUI_SelectionDlgTbl returns wrong data in multi-selection mode
- add: replace all the references to old address virtual-sky.com (not used anymore) to notecasepro.com
- add: Lua API Nc_Doc_SendViaEmail now accepts -1 value for parameter nSelection (meaning nothing to export, i.e. mail with no attachment)
- add: "No title decoration" option when exporting to .txt format (avoids prefixing title with "*" character)

As previously deprecated, Ubuntu 23.10, Fedora 37, Mageia 8 were removed now.