What's new: content edits. (#9588)
What's new edits:
* Eclipse: intro edits.
* Excel/browse mode: vise versa -> vice versa.
* Volum buttons: Windows Explorer -> File Explorer.
* Liblouis 3.9.0: add missing full stop.
* Log viewer/no dev info: Control+F1 -> NvDA+F1, dev info -> developer info.
* Add-ons Manager/disabled add-ons: wording.