integrate request screens with pending notifications

[mxfactorial]

test case titles = expected

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requestScreen displays pending notification from websocket message

1. navigate to requestScreen
2. receive pending notifications websocket event
3. pending messages merged into transaction requests stored in state

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requestDetailScreen displays from notificationDropDownMenuItem

1. sign into account with pending notifications > 0
2. select notificationFlag on homeScreen to display notificationDropDownMenu
3. select notificationDropDownMenuItem on notificationDropDownMenu

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notificationCounter decrements and notificationDropDownMenuItem removed from notificationDropDownMenu

1. sign into account with pending notifications > 0
2. select notificationFlag on homeScreen to display notificationDropDownMenu
3. select notificationDropDownMenuItem on notificationDropDownMenu to display requestDetailScreen

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clearnotifications websocket event sent for single cleared notificationDropDownMenuItem

1. sign into account with pending notifications > 0
2. select notificationFlag on homeScreen to display notificationDropDownMenu
3. select notificationDropDownMenuItem on notificationDropDownMenu to display requestDetailScreen

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*estimations will include unit and e2e test coverage of requirements. new screens will include an e2e inventory test (example)