ActivityForm - Redirect to contact page or activity view in standalone mode

[colemanw]

Overview

When using the "standalone" New Activity form, it always redirects to the dashboard after saving. This changes it to redirect to the contact page (if 1 contact) or the activity view screen (if multiple).

Before

New Activity redirects to dashboard after save (in standalone mode).

After

New activity redirects to view the activity, or if it involves a single contact, to their activity tab.

[civibot]

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[colemanw]

@demeritcowboy can you review this?

[demeritcowboy]

• General standards
  • [r-explain] PASS
  • [r-user] PASS
  • [r-doc] PASS
  • [r-run] PASS
    • It's not specific to this PR just more noticeable during testing this PR because of the focus on the with contact: When you get a validation error it rearranges the order of the with contacts. Everything still works though.
    • Tested standalone and popup for meeting/phonecall. Tested with both creating a separate activity per contact and a single one. Also contribution activity. Tested case activity.
• Developer standards
  • [r-tech] PASS
  • [r-code] PASS
  • [r-maint] Undecided Not sure how you'd write a test for this.
  • [r-test] PASS