[LyX/2.2.x] Revert menu name "Source Pane"

[Guillaume Munch]

commit cdc75e872a73c8c74c477a0b731aa926dc8b36f2
Author: Guillaume Munch <g...@lyx.org>
Date:   Tue Oct 25 19:33:02 2016 +0200

    Revert menu name "Source Pane"
    
    Such a change should not happen in stable. Introduced at a36706c3ff.
---
 lib/ui/stdmenus.inc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/lib/ui/stdmenus.inc b/lib/ui/stdmenus.inc
index 87c78ed..62ed8e2 100644
--- a/lib/ui/stdmenus.inc
+++ b/lib/ui/stdmenus.inc
@@ -336,7 +336,7 @@ Menuset
                Item "Fold Math Macro|d" "math-macro-fold"
                Separator
                Item "Outline Pane|u" "dialog-toggle toc"
-               Item "Code Preview Pane|P" "dialog-toggle view-source"
+               Item "Source Pane|S" "dialog-toggle view-source"
                Item "Messages Pane|g" "dialog-toggle progress"
                Submenu "Toolbars|b" "toolbars"
                Separator