Add a dropdown in the encounter list page to select the month of encounter

[rameez25]

Background

This story is related to #377 where we have decided to remove the "load previous month" button and replace that with a month picker/ dropdown. This is for the ease of scrolling to previous month's data.

Acceptance Criteria

AC1

Given a user is logged in When a user visits the encounter list page Then the user should be able to view a dropdown to select the month of encounter

AC2

Given a user visits the encounter list page When user clicks on the dropdown list Then the dropdown list should have the months ordered in descending order

AC3

Given a user visits the encounter list page When the user clicks on the dropdown list Then the dropdown list should only have 12 months

AC4

Given a user visits the encounter list page When the user selects a month in the dropdown Then the encounter list for that month should be displayed

AC5

Given a user visits the encounter list page When the user can see the dropdown list Then there will be no Load Previous Month button the Encounters page

Wireframes

Link

Tech Tasks

• [x] Create Toggle to Select a Month to load previous encounters using a DropDown
• [x] Implement the DropDown on the Encounters Page
• [x] Fetch data from the firestore based on the selected month
• [x] Toggle the Load Previous Month button
• [x] Toggle On the ENCOUNTERS_BY_MONTH_DROPDOWN_FEATURE_TOGGLE_DEV in DEV and UAT