1.6.0 IDE verbose compile output misdirected while compiling with multiple projects open at same time

MacOS Java6 IDE 1.6.0
1. Set preferences to verbose compiler output
2. Open 2 sketches in different windows (pick one that has several libraries to compile so the verify stage takes a little bit of time...)
3. Click on Verify on one of them
4. While the compile is happening and generating progress output (i.e., before it finishes), click on the other sketch's window

BUG: watch the first sketch's compile output be redirected to the second sketch's window's output region.

Reproduce the issue in the MacOS Java6 IDE by compiling one sketch while switching to another open sketch window. Trace how verbose compile progress is routed between the two windows; done when output remains in the sketch that started compilation, even after switching windows.

Written by the indexing model from the issue text.