Move single hop toggle GA event (#1344)

* Move single hop toggle GA event

Move GA event from setSingleHopOnly hook to toggle function

* Fix code style issues with ESLint

* refactor ternary operator out
Co-authored-by: Lint Action <lint-action@samuelmeuli.com>

src/components/Settings/index.tsx

 import React, { useContext, useRef, useState } from 'react'
 import { Settings, X } from 'react-feather'
+import ReactGA from 'react-ga'
 import { Text } from 'rebass'
 import styled, { ThemeContext } from 'styled-components'
 import { useOnClickOutside } from '../../hooks/useOnClickOutside'
@@ -236,7 +237,13 @@ export default function SettingsTab() {
               <Toggle
                 id="toggle-disable-multihop-button"
                 isActive={singleHopOnly}
-                toggle={() => (singleHopOnly ? setSingleHopOnly(false) : setSingleHopOnly(true))}
+                toggle={() => {
+                  ReactGA.event({
+                    category: 'Routing',
+                    action: singleHopOnly ? 'disable single hop' : 'enable single hop'
+                  })
+                  setSingleHopOnly(!singleHopOnly)
+                }}
               />
             </RowBetween>
           </AutoColumn>

src/state/user/hooks.tsx

 import { ChainId, Pair, Token } from '@uniswap/sdk'
 import flatMap from 'lodash.flatmap'
-import ReactGA from 'react-ga'
 import { useCallback, useMemo } from 'react'
 import { shallowEqual, useDispatch, useSelector } from 'react-redux'
 import { BASES_TO_TRACK_LIQUIDITY_FOR, PINNED_PAIRS } from '../../constants'
@@ -92,10 +91,6 @@ export function useUserSingleHopOnly(): [boolean, (newSingleHopOnly: boolean) =>
 
   const setSingleHopOnly = useCallback(
     (newSingleHopOnly: boolean) => {
-      ReactGA.event({
-        category: 'Routing',
-        action: newSingleHopOnly ? 'enable single hop' : 'disable single hop'
-      })
       dispatch(updateUserSingleHopOnly({ userSingleHopOnly: newSingleHopOnly }))
     },
     [dispatch]