Quake Mode should remember its size

# Description of the new feature/enhancement

I often want the Quake Mode terminal window to be different sizes, depending on what I'm doing at the time. However, the window size always resets upon closing and reopening.

There can be a setting in the config file to allow the Quake Mode window to remember its size upon opening/closing.

Start by locating the Quake Mode window-size handling and the configuration settings used when the terminal opens and closes. The work is done when a configurable setting preserves the Quake Mode window size across closing and reopening, with coverage for the persisted size behavior.

Written by the indexing model from the issue text.