cleanup: better project hierarchy

- adapt file names to match our convention
- sort code in subgroups (no more Sources and Headers groups)

Refs #71037

Change-Id: I585b85b9ba8f86407efc9127f29010117b5ee674
diff --git a/src/PreferencesVC.h b/src/PreferencesVC.h
new file mode 100644
index 0000000..583e2e5
--- /dev/null
+++ b/src/PreferencesVC.h
@@ -0,0 +1,52 @@
+/*
+ *  Copyright (C) 2004-2015 Savoir-Faire Linux Inc.
+ *  Author: Alexandre Lision <alexandre.lision@savoirfairelinux.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *
+ *  Additional permission under GNU GPL version 3 section 7:
+ *
+ *  If you modify this program, or any covered work, by linking or
+ *  combining it with the OpenSSL project's OpenSSL library (or a
+ *  modified version of that library), containing parts covered by the
+ *  terms of the OpenSSL or SSLeay licenses, Savoir-Faire Linux Inc.
+ *  grants you additional permission to convey the resulting work.
+ *  Corresponding Source for a non-source form of such a combination
+ *  shall include the source code for the parts of OpenSSL used as well
+ *  as that of the covered work.
+ */
+#ifndef PREFERENCESVIEWCONTROLLER_H
+#define PREFERENCESVIEWCONTROLLER_H
+
+#import <Cocoa/Cocoa.h>
+
+@interface PreferencesVC : NSViewController <NSToolbarDelegate>
+
+- (void) close;
+@property (nonatomic, assign) NSViewController *currentVC;
+@property (nonatomic, assign) NSViewController *accountsPrefsVC;
+@property (nonatomic, assign) NSViewController *generalPrefsVC;
+@property (nonatomic, assign) NSViewController *audioPrefsVC;
+@property (nonatomic, assign) NSViewController *videoPrefsVC;
+
+- (void)displayGeneral:(NSToolbarItem *)sender;
+- (void)displayAudio:(NSToolbarItem *)sender;
+- (void)displayAncrage:(NSToolbarItem *)sender;
+- (void)displayVideo:(NSToolbarItem *)sender;
+- (void)displayAccounts:(NSToolbarItem *)sender;
+
+@end
+
+#endif // PREFERENCESVIEWCONTROLLER_H
\ No newline at end of file