patch 8.0.1834: GUI: find/replace dialog does not handle some chars

Problem:    GUI: find/replace dialog does not handle some chars properly.
Solution:   Escape '?' when needed.  Always escape backslash. (closes #2418,
            closes #2435)

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1834,
 /**/
     1833,
 /**/