patch 8.1.2277: terminal window is not updated when info popup changes

Problem:    Terminal window is not updated when info popup changes.
Solution:   Redraw windows when re-using an info popup. (closes #5192)

src/ex_cmds.c

@@ -4971,6 +4971,9 @@ prepare_tagpreview(
 		    popup_show(wp);
 		else
 		    popup_hide(wp);
+		// When the popup moves or resizes it may reveal part of
+		// another window.  TODO: can this be done more efficiently?
+		redraw_all_later(NOT_VALID);
 	    }
 	}
 	else

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2277,
 /**/
     2276,
 /**/