Adds some LibreOffice hardenings (using Registry settings):
- set MacroSecurityLevel for LibreOffice to highest level
- Ctrl-Click to follow Hyperlinks
- Block Untrusted Referer Links
- Enforce Update Checks
- Disable Updates from Links (Calc)
Known Issues:
- Enforce Update Checks can't set the time interval (e.g. to one day, which would be better)
- Disable Updates from Links setting is also available (and implemented) for Writer, but does not work.
- Needs further testing
- Parts of text in UI is shown "fuzzy" (bug in current fyne.io UI framework)
Please use hardentools.exe for standard use cases.