patch 8.2.2007: test for insert mode in popup is not reliable

Problem:    Test for insert mode in popup is not reliable.
Solution:   Wait for the popup to disappear. (Ozaki Kiichi, closes #7321)

Author: brammool

src/testdir/test_terminal.vim

@@ -1266,7 +1266,7 @@ func Test_terminal_popup_insert_cmd()
   call assert_equal('n', mode())
 
   call feedkeys("\<C-D>", 'xt')
-  sleep 50m
+  call WaitFor({-> popup_list() == []})
   delfunc StartTermInPopup
   iunmap <F3>
 endfunc

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2007,
 /**/
     2006,
 /**/