See #17144 (closed) for detailed discussion.

Replace the Lock Data Range checkbox with a combo box labeled Automatically Rescale Range When and the combo box has the following 4 options:

1. Never,
2. Grow and update on 'Apply',
3. Grow and update every timestep, and
4. Clamp and update every timestep.

Note this will impact old pvsm and py files. Make sure those state files/scripts continue to work despite the fixes for this.

• Handle rescaling on 'Apply'
• Handle rescaling on timestep update and animation
• Handle rescaling when the Rescale to Data Range button is clicked
• Handle when setting custom range and Rescale and disable automatic rescaling button is clicked
• Make sure the scalar opacity function reflects the expected rescaling behavior
• Initialize the value of the transfer function mode to the global setting.
• Implement backwards compatibility for state files
• Implement backwards compatibility for Python