vim-patch:9.0.1983: scrolling inactive window not possible with cursorbind (#25507)

Problem:  Scrolling non-current window using mouse is inconsistent
          depending on 'scrollbind'/'scrolloff' and different from GUI
          vertical scrollbar when 'cursorbind' is set.
Solution: Don't move cursor in non-current windows for 'cursorbind' if
          cursor in the current window didn't move.

closes: vim/vim#13219
closes: vim/vim#13210

8e5f26ec6a

test/old/testdir/setup.vim

@@ -50,6 +50,9 @@ tlunmenu *
 " roughly equivalent to test_setmouse() in Vim
 func Ntest_setmouse(row, col)
   call nvim_input_mouse('move', '', '', 0, a:row - 1, a:col - 1)
+  if state('m') == ''
+    call getchar(0)
+  endif
 endfunc
 
 " Prevent Nvim log from writing to stderr.