#74 design jusbib tree
Design sidebar
Merge branch 'development' of https://github.com/swissbib/vufind into development
Merge branch 'feature/sidebar' into development

Conflicts:
	themes/sbvfrd/less/sbvfrd.less
	themes/sbvfrd/less/variables.less
	themes/sbvfrd/templates/search/advanced/layout.phtml
Fixed merge