Change the upper limit of the dynamic range in dBFS ("U" KEYBIND) does not work.

[Divzed]

The upper limit does not change when pressing "U" key.
Change the lower limit of the dynamic range in dBFS "L" works fine.

Also, can selected color palette (red/green/grey) be saved permanently when exiting spek?
Would be nice to have this option in the Edit > Preferences > General, or at least set green palette as default as it was in the v0.8.2.
It's very annoying to change it every time. Green-Blue has better contrast/visibility on dark background [0, 0, 0] than Red-Purple.