Update parts price from parts search

[einhverfr]

https://sourceforge.net/p/ledger-smb/feature-requests/305/

[einhverfr]

Would need extra test cases, but should be doable in a minor branch without any headache.

[ehuelsmann]

@einhverfr the link to SF is now dead. Could you provide some imagery or a longer description of the desired functionality so I can estimate how much work this is?

[einhverfr]

The goal would be to go to the parts search results and update prices. I don't think it is a huge amount of work in the current architecture. But if we wait for more of a services-oriented architecture, it might be even easier.

I don't think descriptions need to be editable from there.