Add details on job cards to Interactive Apps page

[wwarriner]

At this section: https://docs.rc.uab.edu/cheaha/open_ondemand/ood_layout/#my-interactive-sessions

Take the image shown (job card on My Interactive Sessions page) and point out the various features of it.

• Name (Slurm Jobid)
• Host (cluster node)
• Created at (relates to sacct)
• Time remaining
• Session ID + URL (job folder for support)
• Top-right stats (nodes, cores, state)
• Delete button
• Launch Button
• View Only Button (needs testing)

Also add an image for the card during the queued state. Point out differences.

Planned layout:

• Current Content
• Subsection: Job Cards
• Subsub: a queued card
• Subsub: a started card

[wwarriner]

Also add some information on how to download the job folder as a zip file and pass it along to support.

[wwarriner]

Raw sample images of the three states, for both "GUI" style and "Server" style job cards.

GUI style

Server style

[wwarriner]

Another addition:

FAQ entry on causes for disappearing job cards.

We don't have one yet on ask.ci. Separate issue for that FAQ entry here: #473