patch 9.0.0464: with virtual text "above" indenting doesn't work well

Problem:    With virtual text "above" indenting doesn't work well.
Solution:   Ignore text properties while adjusting indent. (issue #11084)
diff --git a/src/charset.c b/src/charset.c
index a19e55b..c5edaf4 100644
--- a/src/charset.c
+++ b/src/charset.c
@@ -954,7 +954,7 @@
     cts->cts_line = line;
     cts->cts_ptr = ptr;
 #ifdef FEAT_PROP_POPUP
-    if (lnum > 0)
+    if (lnum > 0 && !ignore_text_props)
     {
 	char_u	*prop_start;
 	int	count;