Unfortunately this is the largest available, themes can't control the palette size. ;/ I'll make this as a suggestion.
To take out the separator check out this: https://twitter.com/aseprite/status/1126549024625057799
Today I accidentally discovered that if you hold CRTL and use the mouse wheel, you can increase or decrease the size of the palette.
WHAT!!! That's awesome, I never knew about this, thanks for sharing!!
:D
This theme is awesome and so are you!
I did not know you could CRTL and mouse wheel to make the palette bigger! Woot woot.
