XML Copy Editor Svn

Improvements to background validation.

Updated for 1.2.0 - all changes relating to full background validation

Updated contributors for 1.1.0.7 (esp. backlight)

Added XSD element inspection

Code cleanup.

Indicators should now clear as intended.

Updated toggle fold so it works if cursor isn't in head line (feature request 1824940).

Code cleanup ahead of 1.1.0.3

Added the GPL Copyright notice to all cpp and h files.

Code cleanup.