Make the editor and console resizable

[cs136]

Submitter: Tim Brecht Feature request. Ideally I would like to be able to grab the line between the left panel and right (console) and adjust the width of both by moving the dividing line.

If that isn't possible, could you please make the console panel narrower (e.g., 35% of the screen width). Ideally configurable by the user. When trying to do demos in class the code on the left needs to use a large font and when that happens most of the code line wraps, making it really ugly and hard to read.

[ariena]

Tim, I think you will find the Resize feature useful. It arranges the editor and the console vertically rather than horizontally.

[e45lee]

I will close this as now as we do have something in place that works. Time permitting, and if our codebase permits, we will try to see if we can't implement the resize feature as described in this issue.

[yuliswe]

implemented #658