Plain about:blank windows are invisible

[peterflynn]

1. Run window.open("about:blank") in Brackets (either run in dev tools console, or write an extension that does this)

Result: Window is invisible. It is minimal size (just big enough to show a small titlebar with no body), and positioned offscreen just past the lower-right corner of the monitor.

Expected: window opens at some default size, somewhere on screen.

This is a regression due to adobe/brackets-shell#472. If any extensions rely on it, we definitely need to fix this before next release. CC @JeffryBooher

[JeffryBooher]

Windows only. Mac and Linux are not affected

[redmunds]

FBNC to @peterflynn

[redmunds]

Confirmed. Closing.