[Draft] Apps wire up the correct install, activate, manage, delete UI

[ErisDS]

This is a draft issue to go along with #2065 as it is anticipated that work will be required after #2083 and #2040 to get the app screens wired up exactly correctly.

[sebgie]

I have started to compile a list of tasks the lifecycle functions should execute - not complete and open for additions.

• install
  • install dependencies (see Install App Dependencies #2099)
  • update settings.installedApps
  • insert default app_settings (see Database / Schema Additions for apps #2102)
• activate
  • update settings.activeApps
• deactivate
  • update settings.activeApps
• delete
  • delete default app_settings
  • update settings.installedApps
  • should we remove dependencies?
• update? (see App version/updates #2214)

[JohnONolan]

This is ancient - will be reopened with new issue/spec to reflect work that has happened in the last year