Refer to the original issue: **Default Profile for Common Profile Settings** #2325
So this is my summary of everything we discussed regarding "default profile settings". The original PR was #3369, but we were _not_ in agreement on the UX, so this PR is for discussion about that.
I put forth 4 proposals that were mentioned in the discussion.
In the discussion that followed, we decided the 3rd proposal was the best. The doc reflects that choice.
* First draft of a spec for splitting off the existing VT52 escape sequences, and extending the VT52 support.
* Make the issue ID visible on GitHub.
* Added suggested mappings for the Graphics Mode character set.
* Add escape sequences for all the commands and clarify the use of the ESC < sequence when switching back to ANSI mode.
* Add details about the differing boundary rules of the VT100 CUP command and the VT52 Direct Cursor Address command.
* Specify the identifying sequence that the Identify command should return.
* Add details of the print commands.
* Add a list of keyboard sequences that are different in the VT52 mode, and make the description of the Keypad Mode commands a little clearer.
* Add a section describing the testing needed to cover the new functionality.
Submitting first draft of spec template, and `contributing.md` outlining our guidance on how to engage with us, file issues, suggest features, submit changes, etc.
