Only count pickups via the function getMyStore until the current day

Closes no issue

What does this MR do?

The number of pick-ups from a store on the map is not correct.

All pickups that are confirmed are counted, even if they have not yet taken place.

How confident are you it won't break things if deployed?

(be honest!)

Links to related issues

Any relevant links (issues, documentation, slack discussions).

• https://foodsharing.freshdesk.com/a/tickets/235
• https://yunity.slack.com/archives/CDFSR3Y4U/p1592757292004800
• https://yunity.slack.com/archives/C1T1ZM9A4/p1593382992147200

How to test

Steps a reviewer can take to verify that this MR does what it says it does e.g.

1. Checkout branch locally
2. Login as foodsaver
3. ...

Screenshots (if applicable)

Any relevant screenshots if this is a design / frontend change

Checklist

• added a test, or explain why one is not needed/possible...
• no unrelated changes
• asked someone for a code review
• joined #foodsharing-beta channel at https://slackin.yunity.org
• added an entry to CHANGELOG.md (description, merge request link, username(s))
• Once your MR has been merged, you are responsible to update the #foodsharing-beta Slack channel about what has been changed here. They will test your work in different browsers, roles or other settings