Added commenting and errorhandling

webstillas/src/components/Login.js

webstillas/src/components/ProtectedRoute.js

webstillas/src/components/Signup.js

webstillas/src/components/Spinner.js

...illas/src/components/logistics/scaffold/addScaffolding.js

webstillas/src/components/projects/elements/Modal.js

webstillas/src/components/projects/elements/card.js

webstillas/src/components/projects/elements/preView.css

webstillas/src/components/projects/elements/preView.js

webstillas/src/components/projects/tabView/Tab.js

webstillas/src/components/projects/tabView/Tabs.js

webstillas/src/components/userinformation/userInfo.css

webstillas/src/components/userinformation/userInfo.js

webstillas/src/context/UserAuthContext.js

webstillas/src/firebaselogin.css

webstillas/src/modelData/addData.js

webstillas/src/modelData/constantsFile.js