Paging component

[jamesmisson]

#1557 has a new React component for the paging buttons. Review this code and separate into a new PR.

• The paging component should use the new React button component (Create base React component for buttons #1805 )
• The position should be configurable based on the decision made in Research and decide positions of paging component and title #1806 (bottom or header)
• As an overlay at bottom of canvas, it should be semi-transparent like the image control buttons in Panel restructure #1635
• Accessible keyboard navigation