Bug fix/issue 8841 (#8979)

* fixed issue 8841

* changelog

CHANGELOG

@@ -1,6 +1,9 @@
 devel
 -----
 
+* fixed issue #8841: Graph Viewer dropped ability to edit an edge after
+  rerendering.
+
 * upgraded arangodb starter version to 0.14.3
 
 * ArangoQueryStreamCursor.prototype.id needs to be a string, v8 32 bit integers

js/apps/system/_admin/aardvark/APP/frontend/js/views/graphSettingsView.js

@@ -339,6 +339,8 @@
         if (nodeStart) {
           config[combinedName].nodeStart = nodeStart;
         }
+        // enable edge editing by default (as this was an option in the past)
+        config[combinedName].edgeEditable = 'true';
 
         var callback = function () {
           self.lastConfigChange = new Date();