It would be helpful to see incoming changes in Project View as well. Currently, only if the file is opened, there is yellow header saying that the file was modified (nice).
For instance, a different background for a file in Project View would not be unnoticed. Also, all containing folders of the file, all the way up to the module, could also have different background. This way externally updated parts of the project will be easily visible, even without polling the Changes window, and no matter how project tree is collapsed.