Imrpove input and validation

[OlaBekkevold]

There are currently a lot of forms in the website that require inputs and a lot of them lack proper validation or have unclear requirments. This has to be implemented on the client(html form) and in the backend to improve user experience and prevent errors

[OlaBekkevold]

This issue should be pinpointed to specfic cases instead of existing as a general and never ending issue