removed scanout message

Fix bug where long pressing the favorite's items would crash

Added floating button to move recommendended items to required list

mainWindow.py, lines 54-58 included the commit message from previous commit

Added functionality when an item's quantity goes to zero, it will be sent to the recommended items list if its not on a list already

Added a primary and secondary scanner signal in the central window. This is necessary so each window (main window, favorite's window, etc) are called so they can update their visual elements since the database information MAY have changed. These functions cannot be connected/disconnected on the actual scanner signals themselves because this messes with the scan to continue functionality in the expiration box and new item details box. Each window has a function that is called whenever a barcode is scanned to update their views.

Fixed issue where the lists in the favorite's window does not update if the add or remove buttons are clicked.

Fixed bug where program crashes if you select pending category in new item details box.

Merge pull request #15 from addisonElliott/ScanningUpdate

Added new shopping list icon button.

Update recommended items at a particular interval

Renamed floatingPB1 and floatingPB2 to a more suitable reqItemRemoveBtn and recItemRemoveBtn.

Added check to make sure the item exists when scanning an item out

Moved the callback functions for scan to cancel functionality.

Moved the callback functions for scan to cancel functionality.