nvim: after/plugin/cmp: Update nvim-cmp settings

Support for use of floating windows for completion menus landed
upstream. It introduced a new feature but also broke things. Having
native_menu set completely breaks auto completion.

While at it, add mapping for scrolling docs. Also add support for it
in color scheme.

nvim/.config/nvim/after/plugin/cmp.lua

@@ -24,6 +24,8 @@ cmp.setup {
     border = 'rounded'
   },
   mapping = {
+    ['<C-d>'] = cmp.mapping.scroll_docs(-4),
+    ['<C-f>'] = cmp.mapping.scroll_docs(4),
     ['<CR>'] = cmp.mapping.confirm({
       behavior = cmp.ConfirmBehavior.Replace,
       select = true
@@ -50,5 +52,9 @@ cmp.setup {
       name = 'path',
       priority = 5
     },
+  },
+  experimental = {
+    native_menu = false,
+    ghost_text  = { hl_group = 'Hint' },
   }
 }

nvim/.config/nvim/colors/yolokai.vim

@@ -711,6 +711,14 @@ local highlight_groups = {
 	pandocStrongEmphasis             = { bg=black, fg=purple, style={'bold', 'italic' }},
 	pandocStrongInEmphasis           = 'pandocStrongEmphasis',
 	pandocEmphasisInStrong           = 'pandocStrongEmphasis',
+
+	--[[ 4.4.15 nvim-cmp ]]
+	CmpItemKind           = {bg=black,      fg=orange,      style=NONE         },
+	CmpItemMenu           = {bg=black,      fg=NONE,        style=NONE         },
+	CmpItemAbbr           = {bg=black,      fg=aqua,        style=NONE         },
+	CmpItemAbbrMatch      = {bg=black,      fg=red,         style='bold'       },
+	CmpItemAbbrMatchFuzzy = {bg=black,      fg=aqua,        style='bold'       },
+	CmpItemAbbrDeprecated = {bg=black,      fg=purple,      style=NONE         },
 }
 
 -- We do not care about terminals which do not support 256 colors