Error reading a model file that hasn't been completely persisted.

[alfa-ryano]

After editing a large model, when the model is saved, it takes some time to complete saving the model.
However, FileWatcher already reacts and runs the promise and view generation.
Since the model (XML file) hasn't been wholly persisted, the model loading process will throw an error.

[agarciadom]

We may want to do something like having a patience period between a file having been changed and Picto reacting to it. For instance, when we detect a file having been changed, we don't react to it until it has not been changed any more for 1 second or so.