fix(hues): don't set background where not needed

Details:
- `MsgArea` doesn't need background to be the same as `Normal` bg.
- `PmenuMatch` doesn't need background as it will blend with `Pmenu`.

Author: echasnovski

lua/mini/hues.lua

@@ -509,7 +509,7 @@ MiniHues.apply_palette = function(palette, plugins, opts)
   hi('MatchParen',     { fg=nil,       bg=p.bg_mid2, bold=true })
   hi('ModeMsg',        { fg=p.green,   bg=nil })
   hi('MoreMsg',        { fg=p.azure,   bg=nil })
-  hi('MsgArea',        { link='Normal' })
+  hi('MsgArea',        { fg=p.fg,      bg=nil })
   hi('MsgSeparator',   H.attr_msgseparator(p, autoadjust))
   hi('NonText',        { fg=p.bg_mid2, bg=nil })
   hi('Normal',         { fg=p.fg,      bg=p.bg })
@@ -521,7 +521,7 @@ MiniHues.apply_palette = function(palette, plugins, opts)
   hi('PmenuExtraSel',  { link='PmenuSel' })
   hi('PmenuKind',      { link='Pmenu' })
   hi('PmenuKindSel',   { link='PmenuSel' })
-  hi('PmenuMatch',     { fg=p.fg,      bg=p.bg_mid,  bold=true })
+  hi('PmenuMatch',     { fg=nil,       bg=nil,       bold=true })
   hi('PmenuMatchSel',  { fg=nil,       bg=nil,       bold=true,   blend=0, reverse=true })
   hi('PmenuSbar',      { link='Pmenu' })
   hi('PmenuSel',       { fg=nil,       bg=nil,       blend=0,     reverse=true })