(5) Refactor Person with BaseFormComponent

[Robin481]

The aim of this issue is to refactor the Person-edit and Person-new into a single component called Person-form using the base-form-component.js as base component
As a reference, you can use education-form.js. Be aware that the base-form-component has different hooks provided for the submit action.
Always work with the record instance variable that is declared in the base-form-component. Set it based on whether you pass a record via component parameters or not.
Use education-form.js as a reference for that. For distinguishing behaviour between new and edit action, you can just check whether the record has an id or not.

Definition of Done:

• Person-edit and Person-new are united into one component named Person-form
• Person-form uses the Base Component
• Take Adding picture when creating a person #352 into consideration

[lkleisa]

Bugs we found in current state:

1. When you have the form open and select another person in dropdown without closing the form first, it leads to the form of the newly selected person, this form also can't be closed, since the buttons to save and close the form belongs to the normal profile component, that doesn't render anymore.
   Like we already recommended, put the buttons on the form with an Emitter anyways since it leads to confusion (besides fixing the actual bug)
2. When you choose a new profile image and you open the form again, then image is the picture which was set before the new one. If you leave the form without changing any attribute, then there will always be the old image in the edit state. If you change something else while editing, then the image is right selected on edit state.
3. No matter what you save in the form, without changing the profile picture, the changed picture successfully message will always appear.
4. When the user is a dual citizen, the form always loads as a normal citizen, that means in the edit state there is always just one country and the checkbox for dual citizen isn't selected. When you selected, the second country is loaded in the second dropdown so it's most likely just the checkbox that doesn't load the state it has.