* Added tabIndex=0 to <svg> in Slider to allow keyboard focus
* further tests for mobile keyboard fix
* Proof of concept of way to get mobile keyboard to open for Slider component
* Added CSS to slider input box to make it invisible but still usable
* Update to hide text input and move it up to same position as slider
* Change slider text field type to 'tel" to force numeric-only keyboard on mobile
* Added focus/blur handlers and initial styling to show/hide text field component
* Update to insure text field values are updated when slider moves, and vice versa.
* Added timeout handler for Outfitting sliders to raise keyboard after 1500ms. Doesn't work 100% on iPhone.
* Changed touch/mouse down event handlers to change the display value on the parent div, then use componentDidUpdate to set focus on the text box.
* Added tap/hold mousedown/hold keyboard display - works on desktop, iOS, and Android
