Remove a few unused class components, convert a few components to functions (#783)

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

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

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

...op-client/src/components/accounts/MobileAccountDetails.js

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

...top-client/src/components/modals/ConfirmCategoryDelete.js

packages/desktop-client/src/components/reports/Container.js

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

packages/loot-design/src/components/TutorialPoint.js

packages/loot-design/src/components/common.js

upcoming-release-notes/783.md