Function Identifier "add_item" has different functionality in Practice 24-2 and lesson 25

[Joncent]

In Practice 24-2 "Increasing Item Counts", the method description for "add_item()" sais it "Increases the item count by amount"

Immediatly after that, in lesson 25 the same identifier "add_item()" is used to display items in the UI. (Just before the heading "Mapping grid cells to units")

Proposed solution: This second function should be renamed to something like "show_item()" or "add_item_to_ui()" in order to not confuse users.