This update brings large improvements to bulk quiet uninstalls. The screen clutter is reduced, and BCU's quiet uninstall helpers now have proper GUIs or are hidden (instead of cmd windows popping all over the screen). Also, automation of Nsis uninstallers will now try to turn off the "Reboot now" option, among other improvements and fixes.

### Improvements
- Added universal uninstaller with a proper GUI to handle simple deletes instead of using cmd del.
- Added GUI to the uninstaller automatizer (was a cmd window before).
- Added detection and handling of radio buttons during Nsis automation - prevents automatic reboots. 
- Added detailed logging to the uninstaller automatizer. Added time since start to messages.
- Uninstaller automatizer waits a few seconds before exiting to let user read the log now.
- Uninstaller automatizer requires admin privliedges to run now (fixes UAC prompts getting it stuck).
- Hide main window when uninstalling applications to remove screen clutter.
- Fixed simple delete leaving behind empty folders.
- Fixed first start wizard not closing if saving settings fails.
- Updated Task scheduler library.

### Translation updates
- Merged Spanish translation update by Emilio J. Grao
- Merged Spanish installer translation fixes by Jhovany200
- Fixed text on 3rd Spanish wizard page overfowing.

### Repo
- Added help to wiki and updated README
- Added CONTRIBUTING and CODE_OF_CONDUCT.

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