adding fix for elements that do not have a css already defined (Issue #19)
added fix for when an element doesnt have an id or class defined (issue18)
added appropriate messages when media query is not selected (issue21)
fixed bug introduced when fixing this issue. was causing inline editor to always be empty (issue18)
fixed so the header is added to the correct editor when multiple editors are opened (Issue22)
updated so selector select box is created for each editor that is opened (Issue22)