Sell-O-Matic2

a057:

• [772f9fc] Added function to save your current inventory to the save list - Ticket #34
• [11cf82f] Added a new safe mode to avoid selling more that 12 items at the same time - Ticket #42
• [a6d7373] Added dynamic frame for preview - Ticket #43
• [06e5a3d] Moved preview frames to external file to keep things tidy
• [5916431] Fixed issue with preview frame not displaying correctly - Ticket #45
• [6d277b5] Changed the shopping list to also include the item stack size and the amount
• [eb7552f] Minor code changes in DDBB variables
• [6277e70] Remove unused lines of code