Disable Rescale to Custom Data Range when using solid color
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
Normally when you hit the Rescale to Custom Data Range toolbar button, you get a dialog that allows you to select the range of scalar values. However, if currently coloring by a solid color, clicking this box does nothing. This is confusing behavior if you are expecting a dialog box to pop up.
When the color is solid color, the Rescale to Custom Data Range button should be disabled (grayed out). The adjacent Rescale to Data Range should probably also be disabled for consistency.