Enable C1 control codes

[Tyriar]

From @jerch in #1399

C1 control codes - enable or disable? They were not part of xterm.js before, to reassemble old behavior should they be disabled? Btw the old logic would also just print those.

[jazzdelightsme]

I'm particularly interested in the C1 CSI (single-char control sequence introducer) code.

[jerch]

@jazzdelightsme Thats hidden in the transition table definitions of the parser, this in particular in

xterm.js/src/common/parser/EscapeSequenceParser.ts

Line 109 in 70babea

table.add(0x9b, state, ParserAction.CLEAR, ParserState.CSI_ENTRY); // CSI

[Tyriar]

@jerch can we close this one off?

[jerch]

@Tyriar Yes thats long fixed, closing.