Store copyright date as a variable
The copyright year appears
- on the Breadcrumb bar (top of any page)
- on the 'About' dialog (Gear icon at top, then About)
- during Reboot
- during Shutdown
- on the Sign In screen
These should all say '2019'. If you want to test whether these are all generated by variable, I could prepare a branch where the variable is something other than 2019.
So as to prevent error and make bumping up the copyright easier we should store the copyright date in a variable rather than have it listed in five different places.