Update 1.6

This is a major update to the navigation bar for the theme. The update is not a drop-in update and will require a small change in theme options. A full changelog is as follows:

• Added quick links (Facebook, twitter and OSM) to the navigation bar (can be enabled in theme options)
• Redesigned the navigation bar to make better use of wider screens
• Sidebar is now enabled instead of disabled (An update to the settings in theme options will need to be applied to existing themes updating to this version)
• Replace Font Awesome icons with Bootstrap icons
• Updated to Bootstrap 5.0.1
• Re-implemented how wide and full width blocks are displayed. This fixes a bug with fixed backgrounds not working
• Updated a number of node packages for use with development