No calendar and list view for expense and currency manager

[nus-pe-bot]

The list and days view on the application are invalid, no output is shown.

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_{[original: nus-cs2103-AY1920S1/pe-interim#2305]}

[ang-zeyu]

Team's Response

When there are no expense added, both list and days view will show a blank panel. However, the text in the toggle button changes accordingly to tell the user which page he/she is at.(show list if user is in days view, show days if user is in list view).

Duplicate status (if any):

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