Ensure allInstances is a row vector in addNode

Added a check to reshape allInstances to a row vector if it is a column. This prevents issues when iterating over instances and ensures consistent behavior in the addNode method.

Author: ehennestad

code/+openminds/@Collection/Collection.m

@@ -331,6 +331,10 @@ function updateLinks(obj)
                 allInstances = [allInstances{:}];
             end
 
+            if iscolumn(allInstances)
+                allInstances = reshape(allInstances, 1, []);
+            end
+
             for instance = allInstances
                 obj.addNode(instance{1}, ...
                     'AddSubNodesOnly', true, ...
@@ -523,7 +527,6 @@ function load(obj, loadPath, options)
             % Add subnodes first
             obj.addSubNodes(instance)
 
-            
             if ~options.AddSubNodesOnly
                 obj.Nodes(instance.id) = {instance};
                 wasAdded = true;