pt_BR language translation, user experience update
+ Added pt_BR translation (done by Rhander)
+ Close item now works again whilst using a shop with 45+ items.
+ Command fix, now sends (nopermission) node instead of the prefix
+ Shift-Clicking on the increment / decrement items in the purchase window, now adds / minuses 64
+ Button to go back to shop contents from purchase inventory, rather than having to re open it.