patch 8.2.2491: popup window for text property may show in first screen line

Problem:    Popup window for text property may show in first screen line.
Solution:   If the text position is invisible do not show the popup window.
            (closes #7807)
diff --git a/src/popupwin.c b/src/popupwin.c
index 47e7338..b089552 100644
--- a/src/popupwin.c
+++ b/src/popupwin.c
@@ -1193,6 +1193,12 @@
 	textpos2screenpos(prop_win, &pos, &screen_row,
 				     &screen_scol, &screen_ccol, &screen_ecol);
 
+	if (screen_scol == 0)
+	{
+	    // position is off screen, make the width zero to hide it.
+	    wp->w_width = 0;
+	    return;
+	}
 	if (wp->w_popup_pos == POPPOS_TOPLEFT
 		|| wp->w_popup_pos == POPPOS_TOPRIGHT)
 	    // below the text