Commented Unassigned: Wrong handler is unregistered [3410]

In RunProjectAction method VsProjectManager class 2 event handler are registered (Removed and Adding):
```
projectManager.PackageReferenceRemoved += removeHandler;
projectManager.PackageReferenceAdding += addingHandler;
```
Two event handlers are unregistered in catch block, but they are not the same (Removed, Added)
```
projectManager.PackageReferenceRemoved -= removeHandler;
projectManager.PackageReferenceAdded -= addingHandler;
```
Comments: Thanks for reporting this.