[QGIS-Developer] missing *load* button in raster style?

[matteo]

Hi guys,

sorry to insist on this topic but I did not find a solution. With a
custom rater loaded, when hitting on the buttons User Defined,
Cumulative, Min/Max, Mean +- sd to calculate the minimum and maximum
values nothing changes.

Is there a hidden button to look for or the values should change
automatically?

Thanks for any hint

Cheers

Matteo