Replaced input components

Finished:

• Text Field/Input
• Auto Complete for country input
• Use normal text field for company input
• Auto Complete for working groups
• Auto Complete for participation level
• Added aria-labelledby for all input elements
• Replaced Checkbox component
• Updated CustomStepButton component
• Changed navigation structure
• Improve navigation feature to make it work exactly as before
• Finished integration for step 2, 3, 4, 5
• Make Formik work with Material-UI - review page
• Clean up the code

Solved issue67 and issue63

The useEffect hook need to be improved. I need to do a little more research on that and will create another issue for it.