Disable Copy, Revert and Share menu items in a brand new document

[#81150058]
Use a more reliable way of declaring a computed property
Use recordid instead of recordname in a few more API calls

[#82254956]
Make sure we only trigger a rename when the document name is edited via the ui

[#84134420]
Don't save while another save is still in progress

[#83217612]
Use a better dialog when a user's session times out

[#83967106]
Merge pull request #13 from concord-consortium/wip-bug-fixes

Bug fixes related to the document server