Refactor tabular panels to use DataDisplay

[ezio-melotti]

2 years ago a new "DataDisplay" component was added, and used for the ConsumptionBreakdown panel as part of:

• Optimize Step (Working) #161

The PR contains a comment that says:

Next Steps

• Implement DataDisplay and getData for other info panels: greenhouse, inhabitant status, mission info, storage levels (Ryan)
• Implement getData for the remaining panels, minimal other changes. (Grant)

The following panels (in src/components/panels) should be refactored to use DataDisplay:

• PlantGrowth.vue
• InhabitantStatus.vue
• MissionInfo.vue
• StorageLevels.vue