fix(editable): change drag handle to be on top part only

[seaerchin]

Problem

Previously, when we cancelled deletion of a sub-menu, there would be a cursor popping up on the button due to usage of contentEditable.

Solution

Make only the top portion of the accordion teh drag handle. this was preferred over making the icon the drag handle as it preserves existing behaviour on production.

as users have been trained that the entire card can be dragged, we don't want to break that existing mental model. users are also unlikely to drag the body due to the large # of inputs there and small draggable area, so this is a compromise we're (me + design) is ok with for now.

Video:
old behaviour w ss
link here

new behaviour

Tests

• go to nav bar
• add 2 sub menu
• click on delete sub menu but cancel the deletion
• the delete button should not have a cursor

[alexanderleegs]

lgtm