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/main.c b/src/main.c
index a01331f..3a050cf 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1358,7 +1358,7 @@
 	    validate_cursor();
 
 	    if (!finish_op)
-		may_trigger_winscrolled();
+		may_trigger_win_scrolled_resized();
 
 	    // If nothing is pending and we are going to wait for the user to
 	    // type a character, trigger SafeState.