Popups can appear off the screen

[theoriginalbit]

When right-clicking a popup can appear off the screen. Screenshot

A suggested fix would be to have it something like

if mouse x + popup width > screen width
  popup x position = screen width - popup width

or

if mouse x + popup width > screen width
  popup x position = mouse x - popup width

[Gvin]

We are planning to completely rewrite the popup window functionality. This issue will also be fixed. But thanks for reporting!