Use <C-h> and support cmdwin

lua/cmp/utils/misc.lua

@@ -15,6 +15,12 @@ misc.concat = function(list1, list2)
   return new_list
 end
 
+---Return is cmdwin or not.
+---@return boolean
+misc.is_cmdwin = function()
+  return vim.fn.getcmdwintype() ~= ''
+end
+
 ---Get cursor before line
 ---@return string
 misc.get_cursor_before_line = function()

lua/cmp/utils/window.lua

@@ -137,11 +137,11 @@ window.update = function(self)
     end
   else
     if self.swin1 and vim.api.nvim_win_is_valid(self.swin1) then
-      vim.api.nvim_win_close(self.swin1, false)
+      vim.api.nvim_win_close(self.swin1, true)
       self.swin1 = nil
     end
     if self.swin2 and vim.api.nvim_win_is_valid(self.swin2) then
-      vim.api.nvim_win_close(self.swin2, false)
+      vim.api.nvim_win_close(self.swin2, true)
       self.swin2 = nil
     end
   end