rangeslider: keep ref of input rangeslider container
rangeslider: keep ref of input rangeslider container

- so that computed rangeslider range can be copied
  into input container, ensuring that the autorange routine
  isn't called on updates.

asolagmbh/plotly.js,etpinard/plotly.js,aburato/plotly.js,asolagmbh/plotly.js,plotly/plotly.js,iongroup/plotly.js,aburato/plotly.js,plotly/plotly.js,plotly/plotly.js,iongroup/plotly.js,plotly/plotly.js,etpinard/plotly.js,etpinard/plotly.js,asolagmbh/plotly.js,iongroup/plotly.js