patch 8.2.2348: no check for modified files after focus gained

Problem:    No check for modified files after focus gained. (Mathias Stearn)
Solution:   Call ui_focus_change().

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2348,
 /**/
     2347,
 /**/