WPrefs: Disable compilation for code that is 'not_yet_fully_implemented'

These two files provides configuration panels that were never enabled
because they have not yet reached a usable state.

With this patch, we do not compile them anymore to avoid useless stuff in
the program.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>

WPrefs.app/Makefile.am

@@ -23,7 +23,6 @@ WPrefs_SOURCES = \
 	Focus.c \
 	FontSimple.c \
 	Icons.c \
-	KeyboardSettings.c \
 	KeyboardShortcuts.c \
 	Menu.c \
 	MenuPreferences.c \
@@ -32,7 +31,6 @@ WPrefs_SOURCES = \
 	Preferences.c \
 	TexturePanel.c \
 	TexturePanel.h \
-	Themes.c \
 	WindowHandling.c \
 	Workspace.c \
 	double.c \
@@ -40,6 +38,11 @@ WPrefs_SOURCES = \
 	editmenu.h \
 	xmodifier.c
 
+# not_yet_fully_implemented
+#WPrefs_SOURCES += \
+#	KeyboardSettings.c \
+#	Themes.c
+
 AM_CFLAGS =
 
 AM_CPPFLAGS = -DLOCALEDIR=\"$(NLSDIR)\" -DRESOURCE_PATH=\"$(wpdatadir)\" -DWMAKER_RESOURCE_PATH=\"$(pkgdatadir)\" \