Improve filter styling across the platform #2387

Terms

• I have searched open and closed design issues
• I agree to follow activist's Code of Conduct

Description

We need to do some styling on the page filters that are in the platform. Specifically the following needs to be reworked a bit to match the overall style of the platform:

• The left sidebar filters
• The filters on organization events
• The dropdown for QR code downloads

Contribution

Assigning @nicki182 and myself as I'll do the change and she'll review :)