title: Unable to close the Git Repository Configuration window on VisualStudio for Mac after switching to a branch
body: <p>I'm using git project on VisualStudio for Mac. I'm trying to switch branch from master to a dev branch by using the menu
  <strong>Version Control</strong> > <strong>Manage Branches and Remotes</strong>. 
  Branch switched successfully but I am unable to close the Git Repository Configuration window. Close button or window cross nothing works. I can move the window that means no window gets hang or stuck on some process. Please check <a href="https://i.stack.imgur.com/8NGnB.png" rel="nofollow noreferrer">this screenshot</a>. And I'm new on VisualStudio for Mac. Do I miss something? I checked no confirmation popup holds this. Does anyone face similar things?
  FYI, I'm using the VisualStudio for Mac Community version 8.3.8 (build 8)</p>