Enable Admins to set an expiration time for banners

[compwron]

What type(s) of user does this feature affect?

all

Description

People who can make banners, should be able to add an optional banner expiration, after which the banner will stop showing. This is for banners advertising trainings or other seasonal/dated events.

see previous work at #5428

Screenshots of current behavior, if any

Existing banner:

How to access the QA site

Login Details:
Link to QA site

Login Emails:

• volunteer1@example.com view site as a volunteer
• supervisor1@example.com view site as a supervisor
• casa_admin1@example.com view site as an admin
• all_casa_admin1@example.com view site as an all casa admin
  • go to /all_casa_admins/sign_in

password for all users: 12345678

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[sandfortw]

I'll tackle this one.

[sandfortw]

Sorry, some things came up this week and I wasn't able to complete this.