[Feature Request] - default headers for POST arguably not suitable

[abulka]

Default headers for POST add application/json etc. and don't work for most of my use cases. I have to remove almost all of them.

	Header	Value
	Cache-Control	no-cache
	Accept	/
	User-Agent	Flashpost
	Accept-Encoding	gzip, deflate
	Connection	keep-alive
	Content-Type	application/json

Is there a way of configuring this - a header presets feature like postman could be good too, with a default preset.

The defaults by postman and thunderclient etc. are more minimal.