Use a monospace font for update tool "details" section

[alimirjamali]

How to file a helpful issue

The problem you're addressing (if any)

The current font (Source Sans Pro) for Updater GUI progress text_container box is not a monospace font (screenshot below).

The solution you'd like

If the font is changed to Source Code Pro or other monospace font, it will look much better (again screenshot below).

The value to a user, and who that user might be

Better view of update result in GUI updater.

Completion criteria checklist

(This section is for developer use only. Please do not modify it.)