Enable temporary survey

[TaiWilkin]

Overview

Re-enables the temporary survey popup until December 13th, 2020.

Connects #1151

Demo

Testing Instructions

• Run ./scripts/server
• Navigate to :6543/. You should see the survey popup with the updated link. Close the popup.
• Refresh the page. You should no longer see the popup.

Checklist

• fixup! commits have been squashed
• CI passes after rebase
• CHANGELOG.md updated with summary of features or fixes, following Keep a Changelog guidelines

[jwalgran]

When writing up the issue I didn't realize that everyone who dismissed the previous survey dialog would not see the new survey dialog because they already had the key set in their local storage.

I can think of two ways to resolve this:

1. Change the name of the constant/string to SURVEY_2_DIALOG_HAS_BEEN_DISPLAYED or similar
2. Add surveyStartDate, change the local storage key to SURVEY_DIALOG_DISMISSED_DATE, and show the dialog if SURVEY_DIALOG_DISMISSED_DATE either does not exist or is a date less than surveyStartDate. Also remove the SURVEY_DIALOG_HAS_BEEN_DISPLAYED key if it exists to avoid confusion.

Since there is a good chance we will be reusing this feature again, I lean toward the more flexible option 2.

[TaiWilkin]

I've added a section, outside of the component function, which looks for and removes the SURVEY_DIALOG_HAS_BEEN_DISPLAYED key from local storage. We will most likely want to remove this code in the future, once it's had a chance to serve its purpose. (Possibly when we next update the survey URL and start/end dates).

[jwalgran]

Nice fixups. I exercised the new local storage interactions and they look good.