MoreCast: Making the Hiding/Showing of Models more Obvious

[NicolasLivanos]

Describe the task A clear and concise description of what the task is.

Acceptance Criteria

• [ ] Remove current dropdown arrow beside weather condition heading
• [ ] Create/use a MUI icon to represent adding a column (use MUI icon named playlist)
• [x] Update Figma mockups to reflect new icon change

Additional context

• Initially when introduced to MoreCast, some Forecasters were unable to intuit the icon for adding a model column to that weather condition.

[rajpersram]

Figma mockup showing new icon for adding a column, found here.

[brettedw]

MaterialUI button is called PlaylistAdd