Refactor TerminalDispatch (graphics) to match AdaptDispatch#6728

Merged

DHowett merged 3 commits intomicrosoft:masterfrom j4james:refactor-terminal-sgr

Jul 1, 2020

+229-372

Commits on Jun 30, 2020

Add SetTextAttributes and GetTextAttributes methods to the ITerminalApi interface.
j4james
committed
Rewrite the TerminalDispatch::SetGraphicsRendition method to match the AdaptDispatch implementation.
j4james
committed
Remove methods from the ITerminalApi interface that are no longer needed.
j4james
committed