First full working version

public/static/json/tls.MDConcLengths.en.json

@@ -1 +1 @@
-[{"id":"cm","name":"cm"},{"id":"dm","name":"dm"},{"id":"ft","name":"ft"},{"id":"in","name":"inch"},{"id":"m","name":"m"},{"id":"mm","name":"mm"}]
+{"cm":"cm","dm":"dm","ft":"ft","in":"inch","m":"m","mm":"mm"}