Fix for node namespace for nested links

Author: bhunjadi

lib/query/lib/createGraph.js

@@ -146,7 +146,8 @@ export function getNodeNamespace(node) {
     const parts = [];
     let n = node;
     while (n) {
-        const name = n.linker ? n.linker.linkName : n.collection._name;
+        // links can now contain '.' (nested links)
+        const name = n.linker ? n.linker.linkName.replace(/\./, '_') : n.collection._name;
         parts.push(name);
         // console.log('linker', node.linker ? node.linker.linkName : node.collection._name);
         n = n.parent;