Fix issue 646 change saved btn icon

[zheyichn]

• Changed the bookmark icon for saving a property to a check icon.
• Screenshoots:

646-icon-test-local.mov

Closes #646

[vercel]

@zheyichn is attempting to deploy a commit to the Clean and Green Philly Team on Vercel.

A member of the Team first needs to authorize it.

[zheyichn]

Hi @CodeWritingCow, I don't have write access yet and Vercel checks failed, pls let me know if the pr flow above looks right and how to proceeed, thx.

[CodeWritingCow]

Hi @zheyichn I've been seeing this Vercel check failure in other PRs, too. GitHub is trying to deploy your PR to a testing environment in Vercel. However, only someone with admin rights can authorize that deployment. (I tried authorizing it but didn't work.) As a temporary workaround, I'm testing your code in my local environment.

[CodeWritingCow]

Hi @zheyichn, your PR looks good. I watched your screen recording and was able to replicate the new button functionality locally. I'll merge the PR into staging branch. Once we're ready to deploy a new release into production, @nlebovits will make a PR from staging into main branch. Thanks for your work!