Key Sequence Visualizer in dark mode

The new Key Sequence Visualizer is awesome!

Please note that the window in dark mode is shown like this:

The button for clearing the typed events is not readable, and I wonder if there are other labels that are not readable due color matching.

I think also it would be nice to change the background color of this window to a darker color if the user is in dark mode.

Added dark mode support in 6.364