ISIS-537 https://trello.com/c/YaU670zN/36-suggestion-i-wonder-if-the-view-selectors-on-the-far-right-eg-list-vs-summary-vs-gmap3-vs-hidden-should-instead-be-rendered-as-a

Rework the view chooser to use Bootstrap dropdown button.
ISIS-537 Use Button Dropdown for the view selector above tables (as Excel, as Summary, as Chart, as Calendar, etc.)

https://trello.com/c/YaU670zN/36-suggestion-i-wonder-if-the-view-selectors-on-the-far-right-eg-list-vs-summary-vs-gmap3-vs-hidden-should-instead-be-rendered-as-a