Error when header value contains colon

[andresesfm]

Burp Suite Version:
v2020.9.2 Communuty Edition
Description:
When trying to export a request that contains headers with ":" in the body, there's an exception thrown complaining about attempting to create a dict with more than the expected two elements per subarray
Steps or PoCs:

HTTP(s) Requests/Responses:
MY_HEADER: {"param":"val"}
Screenshots:

The following PR fixes the issue and cleans up duplicate code to convert headers to a new dict: #3

[artssec]

Hi @andresesfm thanks for sharing, validated the fix.

[artssec]

LGTM. Merged