macosx: improve main window initialization

This targets the same issue as 5b8a4057, but in a saner approach
(cherry picked from commit f0a7d9a4906754d9c4c5f84354953e8bda79f535)

Conflicts:
	extras/package/macosx/Resources/English.lproj/MainMenu.xib

modules/gui/macosx/intf.m

@@ -650,11 +650,6 @@ static VLCMain *_o_sharedMainInstance = nil;
             [[VLCApplication sharedApplication] setApplicationIconImage: [NSImage imageNamed:@"vlc-xmas"]];
     }
 
-    [o_mainwindow updateWindow];
-    [o_mainwindow updateTimeSlider];
-    [o_mainwindow updateVolumeSlider];
-    [o_mainwindow makeKeyAndOrderFront: self];
-
     [self initStrings];
 
     nib_main_loaded = TRUE;
@@ -688,6 +683,11 @@ static VLCMain *_o_sharedMainInstance = nil;
 
     /* we will need this, so let's load it here so the interface appears to be more responsive */
     nib_open_loaded = [NSBundle loadNibNamed:@"Open" owner: NSApp];
+
+    /* update the main window */
+    [o_mainwindow updateWindow];
+    [o_mainwindow updateTimeSlider];
+    [o_mainwindow updateVolumeSlider];
 }
 
 - (void)initStrings