Add filtering to CIP's project table + rearrange UI components

[smcalilly]

Overview

• closes #257
• closes #271

Demo

Testing Instructions

• visit the cip planner: https://ccfp-asset-d-feature-ci-8u12ya.herokuapp.com/cip-planner/
  • login with username=test / password=supersecret
• create a portfolio
• test these functionalities:
  • adding/removing projects from the portfolio
  • saving changes to the portfolio
  • project table filters
  • project table search
  • renaming the portfolio
  • creating a new portfolio
  • toggling between portfolios
  • exporting a portfolio