Feat/add hide remove

[wswebcreation]

This PR will add 2 new methods for the users that can be added to the methods :

• hideElements: this can be an array of elements that will add the property visibility:hidden to the elements so they will be hidden in the UI
• removeElements: this can be an array of elements that will add the property display:none to the elements so they will be removed from the UI

Both methods are based on #4

Secondly this will add the method hideAfterFirstScroll for saveFullPageScreen and checkFullPageScreen and will basically hide 1 or multiple elements from the UI after the first scroll. This will hide for example sticky headers from a large screenshot. See for example this, the left side was the old way, the right side it the new way

[MortenGregersen]

Looks good! 👍