Change the cookies settings in the cookies block in the GPI Privacy & cookies page

We should display 3 checkboxes:

1. Necessary cookies (first-party)
2. Analytical cookies 
3. Marketing cookies

The text that should be displayed will be provided soon by GPI. Once we have it the ticket will be updated.

Tasks:

1. There should be an option (checkbox) in the sidebar ( Planet 4 > Analytics / cookies text ?) to enable 'analytics' cookies option.
2. When this option is checked, a new cookie field is shown in WYSIWYG for title and description of analytics cookie option.
3. Change cookie block to set the right value in this case. (confirm with Julia that this is the plan)