Browse through search results on detail page with prev/next buttons

[BasLee]

• Allow disabling the buttons using a configuration property
• When the 'es-search-results-page' has been finished, request new ES-page
• Where to put buttons? During development in the footer, next to search.

Related to:

• https://github.com/knaw-huc/textannoviz/issues/106
• https://github.com/knaw-huc/textannoviz/issues/87
• https://github.com/knaw-huc/textannoviz/issues/51
• https://github.com/knaw-huc/textannoviz/issues/59

[kintopp]

Also related to https://github.com/knaw-huc/textannoviz/issues/59 This sounds like something worth discussing across all TAV implementations?