Old auto replies included in new terminal

[gregvanl]

Testing #141341

After creating a new terminal (type doesn't matter), a previous setting value still is included.

I had earlier had a setting value of:

    "terminal.integrated.autoReplies": {
        "Terminate batch job (Y/N)": "Y\r",
        "blah": "_blah_"
    }

The active terminal when the setting value was removed don't have the old value.

[Tyriar]

This seems to be working fine now after the null change was added.

[kimadeline]

Steps I took:

• added the following to my settings.json:

    "terminal.integrated.autoReplies": {
        "blah": "_blah_"
    }

• Opened a terminal and verified that typing blah resulted in blah_blah_
• Changed the settings value to "blah": "what is it"
• Opened a new terminal and verified that typing blah resulted in blahwhat is it