Manage cards without valid start/end dates

[uhppoted]

Ref.:

• failed to update card
• show save / cancel buttons when user edits the From or To columns

The UHPPOTE controller only accepts cards with a valid start and end date but there is a valid use case for uhppoted-httpd to allow a card to be created ahead-of-time without a start or end date. Assigning a default start/end date is not a solution because it potentially allows a temporary card to have unexpected access.

• [x] Lowlight incomplete cards in the UI
• [x] Only load valid'ish cards to the controller
• [x] ACL
• [x] Update simulator to reject cards without a valid start/end date
• [x] Add simulator REST API to create cards without valid start/end dates for testing
• [x] Configurable default start date
• [x] Configurable default end date

[twystd]

1. Added card from/to date zero value check to controller put-card API
2. Added REST put-card API to add/update cards from the REST API without the restrictions of the controller API.

Closing as completed, pending release v08.8.9.