Dark Theme Manager and Modals (#1503)

.eslintrc.js

packages/desktop-client/src/components/BankSyncStatus.tsx

packages/desktop-client/src/components/alerts.tsx

packages/desktop-client/src/components/manager/BudgetList.js

...es/desktop-client/src/components/manager/ConfigServer.tsx

packages/desktop-client/src/components/manager/DeleteFile.js

packages/desktop-client/src/components/manager/Import.js

...es/desktop-client/src/components/manager/ImportActual.tsx

...ges/desktop-client/src/components/manager/ImportYNAB4.tsx

...ges/desktop-client/src/components/manager/ImportYNAB5.tsx

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

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

...sktop-client/src/components/modals/CreateEncryptionKey.js

packages/desktop-client/src/components/modals/EditField.js

.../desktop-client/src/components/modals/FixEncryptionKey.js

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

...esktop-client/src/components/modals/ImportTransactions.js

packages/desktop-client/src/components/modals/LoadBackup.js

.../desktop-client/src/components/modals/PlaidExternalMsg.js

packages/desktop-client/src/components/util/DisplayId.js