Simplify list logic further to prevent misuse (#3334)

* simplify list logic further

more simplification

simplify by removing `isEmpty`

use `isFetchingNextPage` everywhere for clarity

change `isFetching` to `isFetchingNextPage` for clarity

remove some useless `useMemo`s

move `renderItem` and `keyExtractor` out of component

* clean bundle size check

* update deploy

* adjust

* adjust

* one test

* try now

* test it

* done

src/components/Error.tsx

@@ -1,9 +1,9 @@
 import React from 'react'
 import {View} from 'react-native'
-import {useNavigation} from '@react-navigation/core'
-import {StackActions} from '@react-navigation/native'
 import {msg, Trans} from '@lingui/macro'
 import {useLingui} from '@lingui/react'
+import {useNavigation} from '@react-navigation/core'
+import {StackActions} from '@react-navigation/native'
 
 import {NavigationProp} from 'lib/routes/types'
 import {CenteredView} from 'view/com/util/Views'