Redundant campId query parameter automatically added in calendar URLs

[richardolsson]

Description

When navigating the global calendar (the one that includes all events, regardless of project/campaign), there is a redundant campId query parameter added to the URL.

Steps to reproduce

1. Go to http://localhost:3000/organize/1/projects/calendar

Expected Behaviour

URL should be rewritten to include focusDate and timeScale.

Actual Behaviour

URL is rewritten to include campId, focusDate and timeScale.

Screenshots

Possible solutions

I believe this is because of the logic that syncs the calendar's internal state with the URL, introduced (or rather, modified) by #1384. It adds the campId property which is necessary for project-specific calendars, e.g. http://localhost:3000/organize/1/projects/1/calendar, but there probably needs to be some condition to only add it to the object when there is a project/campaign.