[FR] Allow a way to export and import the current active maker orders

[gcharang]

Is your feature request related to a problem? Please describe.
Using the app from a different machine is difficult when there are a lot of open unfilled maker orders. Only solution is to recreate all of them in the new machine manually.

Describe the solution you'd like
A button in settings to export all the current active maker orders

[cipig]

keep in mind that there are the manual orders and there is also the trading bot
i assume that the config for the orders of the trading bot are different... so for those only the trading bot config is needed, not the actual orders, those will be recreated anyway based on the settings