Debugger: Tweaks to ConsoleOutputView.

- When receiving console output, we now put it into a pending output list.
An asynchronous worker thread then tells the view to add another line to
the output view, with a 10 msec delay between lines. This ensures that if
the debugged program has a large amount of console output, it doesn't result
in the debugger UI going unresponsive due to handling the constant influx
of text insertions in rapid succession.

Add support for auto-scrolling.

- If the console output is currently at the bottom, any new output will automatically be scrolled into view. Otherwise,
its current position will be maintained.

Implement #9758.

- Add ConsoleOutputView for showing the debugged team's console output.
The view presents checkboxes for controlling whether or not stdout
and/or stderr output is captured and shown, as well as the
ability to clear the current output.

Debugger: Tweaks to ConsoleOutputView.

- When receiving console output, we now put it into a pending output list.
An asynchronous worker thread then tells the view to add another line to
the output view, with a 10 msec delay between lines. This ensures that if
the debugged program has a large amount of console output, it doesn't result
in the debugger UI going unresponsive due to handling the constant influx
of text insertions in rapid succession.

Add support for auto-scrolling.

- If the console output is currently at the bottom, any new output will automatically be scrolled into view. Otherwise,
its current position will be maintained.

Implement #9758.

- Add ConsoleOutputView for showing the debugged team's console output.
The view presents checkboxes for controlling whether or not stdout
and/or stderr output is captured and shown, as well as the
ability to clear the current output.