Selling items & UI fixes — Shards of the Heart Steam update #7152266

Update Notes Added ReList, an online marketplace accessible through the character's phone, where players can sell unwanted items, weapons, and armor. Added a Phone option to the notebook pause menu. ReList can also be opened directly by pressing P. Added an introductory conversation with April explaining how to use ReList. Fixed the battle item list not scrolling properly when more than five usable items were available. Consolidated several overlapping interface, item, and battle plugins to improve stability and reduce conflicts. Lowered prices for weapons sold at the police station.