Zet hoofdmenu overal in de website

... en verbeter de lay-out van het smoelenboek (alleen-leden deel)
Merge branch 'static' of github.com:khandhas-infra/kninfra into consistent-menu

Conflicts:
	kn/leden/templates/leden/base.html
	kn/static/templates/static/base.html
	kn/static/templates/static/overbase.html
Merge remote-tracking branch 'khandhas/consistent-menu' into static