New Image can cover app frame

The creation of new images can cover the app frame. Perhaps we should make sure that new image window creations don't cover the app frame unless there really is no other choice.

(This may not be deemed that important but it seriously annoys me)

Migrated-From: http://trac.imagej.net/ticket/1429

No files or tests are identified in the issue. Start by locating the code that creates new image windows and examine how their position relates to the app frame; done means a new image window does not cover the app frame unless there is no other suitable placement.

Written by the indexing model from the issue text.