New label types added

New labels added for the Phomemo printers to support the 30x20mm labels.

Defaults changed for filter settings

Filter settings in the cell serial window would only show cells that included the volt drop test. This is changed to allow all cells to be selected either with or without volt drop test.

Filter settings are saved

Cell serials form contains a filter to select only those cells you want to use for your cell packs. The settings are now stored in the database.