fix(editor): use bg for FloatShadow highlight (#966)

Co-authored-by: robin <comfysagedev@gmail.com>

Author: Old-Farmer

lua/catppuccin/groups/editor.lua

@@ -48,7 +48,8 @@ function M.get()
 			fg = C.crust,
 			bg = C.lavender,
 		} or { fg = C.subtext0, bg = (O.float.transparent and vim.o.winblend == 0) and C.none or C.mantle }, -- Title of floating windows
-		FloatShadow = { fg = (O.float.transparent and vim.o.winblend == 0) and C.none or C.overlay0 },
+		FloatShadow = { bg = (O.float.transparent and vim.o.winblend == 0) and C.none or C.overlay0, blend = 80 },
+		FloatShadowThrough = { bg = (O.float.transparent and vim.o.winblend == 0) and C.none or C.overlay0, blend = 100 },
 		Pmenu = {
 			bg = (O.transparent_background and vim.o.pumblend == 0) and C.none or C.mantle,
 			fg = C.overlay2,