"1. HH [Merge] When adding a sense from one entry to a different entry, make the existing senses stay still. (If they are still, then we will be able to merge one sense with another more easily.) Use some other visual indication of whether the sense I’m dragging will go into a sense, or between two senses (e.g., a line showing between the senses, to show where it will go). Right now it is really hard to manipulate these cards, even for experienced users, never mind those who have only just learned to use a mouse. There must be a better way."

This is not supported by the drag'n'drop package we use, react-beautiful-dnd. We may need to refactor on react-dnd.