Fix "invxf2" transfers leaving behind 1 item per stack

[Listerw]

Steps to reproduce:

1. open a stockpile
2. take out a stack of 2 or more items
3. open extra info panel and set group to type
4. alt+shift+l click on the extra info panel's item to transfer all

Results:
1 item will be left behind from the stack. This is likely due to transferring 1 item at a time, leading to a new id being created once there is only one item left in the stack, and so the previous id for that remaining item is no longer valid.

This fixes it by sending the stack size when transferring each item. It only needs to be done once per item in the stack, but I couldn't see an easy way to do it. E.g. see Cediner/ArdClient#104

I've tested this by building locally and transferring stacks of different sizes + an unstacked item using the extra info panel into a stockpile.

[EnderWiggin]

Does this work when transferring ore to the smelter?

[Listerw]

It works with transferring ore to the ore smelter. Trying with black coal, it's unchanged and still does nothing with this type of click when an ore smelter is open.

If you are looking for cases where this doesn't work: having multiple target ExtInventory can still result in this issue. E.g. if you have 2 drying racks open and had a stack of 5 in your inventory, 4 will go to the first rack, then the item slot will become the unstacked version with a new id still.