patch 8.2.4341: command line not redrawn when finishing popup menu

Problem:    Command line not redrawn when finishing popup menu and the screen
            has scrolled up.
Solution:   Redraw the command line after updating the screen. (closes #9722)
diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
index 8c5928f..1beb9af 100644
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -2160,6 +2160,13 @@
   call term_sendkeys(buf, ":sign \<Tab>\<C-A>\<S-Tab>")
   call VerifyScreenDump(buf, 'Test_wildmenu_pum_37', {})
 
+  " After removing the pum the command line is redrawn
+  call term_sendkeys(buf, ":edit foo\<CR>")
+  call term_sendkeys(buf, ":edit bar\<CR>")
+  call term_sendkeys(buf, ":ls\<CR>")
+  call term_sendkeys(buf, ":com\<Tab> ")
+  call VerifyScreenDump(buf, 'Test_wildmenu_pum_38', {})
+
   call term_sendkeys(buf, "\<C-U>\<CR>")
   call StopVimInTerminal(buf)
   call delete('Xtest')