jams-react-client: fix various warnings and remove eslint-disable

jams-react-client/.env

jams-react-client/package.json

...s/jss/material-dashboard-react/components/devicesStyle.js

...s/jss/material-dashboard-react/components/sidebarStyle.js

jams-react-client/src/components/Devices/Devices.js

jams-react-client/src/components/Drawer/Drawer.js

jams-react-client/src/components/Footer/Footer.js

...ct-client/src/components/LanguagePicker/LanguagePicker.js

jams-react-client/src/components/Sidebar/Sidebar.js

jams-react-client/src/layouts/BaseLayout.js

jams-react-client/src/layouts/ListLayout.js

jams-react-client/src/views/Blueprints/Blueprints.js

jams-react-client/src/views/Contacts/Contacts.js

jams-react-client/src/views/Groups/EditGroup.js

jams-react-client/src/views/Groups/Groups.js

jams-react-client/src/views/Settings/Settings.js

...-react-client/src/views/UserProfile/DisplayUserProfile.js

...act-client/src/views/UserProfile/EditCreateUserProfile.js

jams-react-client/src/views/UserProfile/UserProfile.js

jams-react-client/src/views/Users/Users.js