patch 8.2.3983: error messages are spread out

Problem:    Error messages are spread out.
Solution:   Move more error messages to errors.h.
diff --git a/src/filepath.c b/src/filepath.c
index 4a0022e..c3bd54d 100644
--- a/src/filepath.c
+++ b/src/filepath.c
@@ -2464,7 +2464,7 @@
 # endif
     {
 	// TODO: non-GUI file selector here
-	emsg(_("E338: Sorry, no file browser in console mode"));
+	emsg(_(e_sorry_no_file_browser_in_console_mode));
 	fname = NULL;
     }