Replace drag and drop component with position up/down component
Context
The context is provided in the Epic &2 and Table of contents building user stories in #1458 (closed).
Proposal
Depending on threshold testing feedback proposed in the Book Manager Performance User Story, another minimal change is to replace drag and drop with a simpler position up/position down component to improve the user experience of moving chapters a short distance from their current position.
Design
The user clicks on the up or down icon to move a component one position up or down.