containments/desktop: fix minimum size for fullRepresentation in panel (plasmashell freeze)

Christoph Wolkrequested to merge
cwo/plasma-desktop:folderview_bigpanel_minsize into master

The fullRepresentation FolderView in a panel can get stuck if the panel is overly full where it swaps around its representations in a loop, freezing Plasma. This is similar to a related bug affecting the notes widget in bug 505132.

We can use the same strategy here: in case of being a fullRepresentation in a panel, we set the Layout minimum sizes to -1 and it will force the size in a way that makes it not drop back to the compactRepresentation.

Merge request reports