Merge branch 'hotfix/favicon-remove-link' into 'master'

Documentation favicon changed to real file from link

The `favicon.ico` file previously was a softlink that pointed to the favicon of the main web application.  The new Jekyll doesn't copy the favicon, instead just copies the symlink.  This means that it can't serve the file because it's in the wrong location once the symlink gets copied.  This merge just makes the favicon a real file instead of a symlink.

This hotfix should not require rebuilding of the `.war` file because nothing there changed.  The `0.12.0` tag should be moved up to this commit.

See merge request !807