patch 8.1.1266: winbar test doesn't test enough

Problem:    Winbar test doesn't test enough.
Solution:   Check that the WinBar actually shows up.  Correct check for clicks
            with no effect. (Ben Jackson, closes #4338)

src/testdir/test_winbar.vim

@@ -4,10 +4,15 @@ if !has('menu')
   finish
 endif
 
+source shared.vim
+
 func Test_add_remove_menu()
   new
   amenu 1.10 WinBar.Next :let g:did_next = 11<CR>
   amenu 1.20 WinBar.Cont :let g:did_cont = 12<CR>
+  redraw
+  call assert_match('Next    Cont', Screenline(1))
+
   emenu WinBar.Next
   call assert_equal(11, g:did_next)
   emenu WinBar.Cont
@@ -28,6 +33,7 @@ func Test_click_in_winbar()
   amenu 1.20 WinBar.Cont :let g:did_cont = 12<CR>
   amenu 1.30 WinBar.Close :close<CR>
   redraw
+  call assert_match('Next    Cont    Close', Screenline(1))
 
   let save_mouse = &mouse
   set mouse=a
@@ -38,7 +44,7 @@ func Test_click_in_winbar()
   let g:did_next = 0
   let g:did_cont = 0
   for col in [1, 8, 9, 16, 17, 25, 26]
-    call test_setmouse(1, 1)
+    call test_setmouse(1, col)
     call feedkeys("\<LeftMouse>", "xt")
     call assert_equal(0, g:did_next, 'col ' .. col)
     call assert_equal(0, g:did_cont, 'col ' .. col)

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1266,
 /**/
     1265,
 /**/