GUI provide intuitive way to change material name and magnetization in sample designer

GUI > Sample > add layer: creates layers with "Material: Default". How to change that material name? Answer: the functionality is hidden behind a button with label "...".

added GUI essential functionality labels

changed title from how to change material names in sample designer? to GUI provide intuitive way to change material name and magnetization in sample designer?

changed the description

changed title from GUI provide intuitive way to change material name and magnetization in sample designer? to GUI provide intuitive way to change material name and magnetization in sample designer

mentioned in issue #802 (closed)

mentioned in merge request !2111 (merged)

mentioned in commit 4fdc9f66

closed with merge request !2111 (merged)