Make it easier to reset threshold when ranges change
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
When the "Scalars" selection on the Properties panel for "Threshold" filter is changed, we need to provide the user an indication that the min/max values should potentially be rest to updated range as well as providing an easy way for doing it.
We recently added support for something similar to the "Glyph" filter's panel. The "Scale Factor" property has a "Reset using current data values" button next to it. We should do something similar for min/max.