Summary: 800x600 is more appropriate than 640x480, which was causing problems. This is part two of a fix for this bug. The previous one (D3) used the right terminal. This one fixes the display issue.
Test Plan:
1. Right click on nm-tray
2. Select "Edit Connections"
Assuming the other fix is present, should display nmtui-edit fully in a window.
Reviewers: tsimonq2
Differential Revision: https://phab.lubuntu.me/D6
