import older GE tracker stuff

[savannah-borst]

Last weeks I played without logging in on RuneLite. Now I see there is a way to keep tabs on GE on the website. But my not logged in trades are not in here.

There is an export version but how about an import version? Cause it will only track from now on. I got older trades in my flipping utilities plugin and even in the flipping map in the .runelite folder but no way to insert them on the website.