Unit Test Text Display output improvements

Seeing the full textual output of a test (i.e. "Text Display") can be useful when debugging why a test failed. Often this is more convenient than inspecting the large tree in the "Visual" display mode.

However, the "Text Display" mode has some drawbacks that make it inferior to the "Application Output":

• Clicking while tests are running causes the output to be inserted at the point that was clicked rather then at the end as would be expected. This jumbles up the output.
• There is no "Filter" feature to reduce the amount of output
• The text uses "PS" (the non printable sub character 26?) characters as newlines, making it hard to copy-paste it to other applications