upgrade eslint-plugin-import and fix issues (#492)

.eslintrc.js

packages/desktop-client/package.json

packages/desktop-client/src/components/App.js

packages/desktop-client/src/components/FinancesApp.js

packages/desktop-client/src/components/Titlebar.js

packages/desktop-client/src/components/accounts/Account.js

...s/desktop-client/src/components/accounts/MobileAccount.js

...ages/desktop-client/src/components/budget/MobileBudget.js

...desktop-client/src/components/budget/MobileBudgetTable.js

...ges/desktop-client/src/components/manager/ConfigServer.js

...es/desktop-client/src/components/manager/ManagementApp.js

.../desktop-client/src/components/payees/ManagePayeesPage.js

...ktop-client/src/components/schedules/DiscoverSchedules.js

...s/desktop-client/src/components/schedules/LinkSchedule.js

...desktop-client/src/components/schedules/SchedulesTable.js

packages/desktop-client/src/components/schedules/index.js

...ages/desktop-client/src/components/settings/Encryption.js

packages/desktop-client/src/components/settings/index.js

packages/loot-core/package.json

packages/loot-core/src/client/actions/account.js