I'll coin a term of some sort only for use on the page Character Slot Management.
Coining a term just for one page seems like a really good reason
not to coin a term at all.
Looking at that article, I fail to see why such a term is necessary.
Using an example from the article: "Highlight the character, click the server transfer icon, and follow the prompts." You could simply say "Highlight the character, click the server transfer icon at the top of the Character Selection Screen, and follow the prompts."
Another example is the line "Click the red Delete Character icon at the top of the window." which could become "Click the red Delete Character icon at the top of the Character Selection Screen."
I think coming up with a term for that part of the screen is as likely to confuse as it is to clarify. The points to be made can be made clearly without using a new term.