Allow staff members the ability to select a default paper size which will be
used in printing tickets via PDF. In the future, this may be overridden per
ticket by a dialog box at print time.

Move pending upgrade check to core class from config. Decouple core from config (doesn't extend config anymore)

Fix bug where setting overwrote all config rows because of missing where clause - (hint: multiple configs coming...)

Feature/datepicker

Feature/inline notes

Feature/ajax urls revisited