add soliditySlider

src/ui/SoliditySlider.js

+'use strict'
+var Slider = require('./Slider')
+var utils = require('../helpers/util.js')
+
+class SoliditySlider extends Slider {
+  constructor (_traceManager, reducedTraceBySourceLocation) {
+    super(_traceManager)
+    this.reducedTraceBySourceLocation = reducedTraceBySourceLocation
+  }
+  setValue (value) {
+    super.setValue(utils.findLowerBoundValue(value, this.reducedTraceBySourceLocation))
+  }
+}
+
+module.exports = SoliditySlider