Make valid projects a target of "store item in container"

[RedQueen.exe]

A lot of places have materials that are in large quantities, and frequently used for projects, just sitting open on the ground (like wheat for grinding, hematite for crushing, etc.) It would be nice if, when starting large projects, you didn't have to pick up handfuls of the resource and THEN add it to the project each time, but could add it to the project right from the ground.

If we can avoid it, I'd rather not see the interface clogged with yet another resource button. Is it possible that we could put a third drop down for the "store resource" interface that would let you choose a (valid) project, rather than an in-inventory or on-ground storage location?

And while we're on it, great job to Greek and psychowico for the work you have both already done!