patch 9.0.0917: the WinScrolled autocommand event is not enough

Problem:    The WinScrolled autocommand event is not enough.
Solution:   Add WinResized and provide information about what changed.
            (closes #11576)
diff --git a/src/edit.c b/src/edit.c
index cf114d8..2e6a980 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -1510,7 +1510,7 @@
     }
 
     if (ready)
-	may_trigger_winscrolled();
+	may_trigger_win_scrolled_resized();
 
     // Trigger SafeState if nothing is pending.
     may_trigger_safestate(ready