When screens don't have separate spaces, only hide menu bar when iterm is on the first screen

FutureMethods.h

@@ -123,5 +123,6 @@ CTFontDrawGlyphsFunction* GetCTFontDrawGlyphsFunction(void);
 @interface NSScreen (future)
 - (CGFloat)futureBackingScaleFactor;
++ (BOOL)futureScreensHaveSeparateSpaces;
 @end

FutureMethods.m

@@ -234,6 +234,14 @@ static FutureNSScrollerStyle GetScrollerStyle(id theObj)
     }
 }
++ (BOOL)futureScreensHaveSeparateSpaces {
+    if ([self respondsToSelector:@selector(screensHaveSeparateSpaces)]) {
+        return [self screensHaveSeparateSpaces];
+    } else {
+        return NO;
+    }
+}
+
 @end
 static void *GetFunctionByName(NSString *library, char *func) {

PseudoTerminal.m

@@ -4552,7 +4552,8 @@ NSString *sessionsKey = @"sessions";
         currentScreen = [NSScreen mainScreen];
     }
-    if (currentScreen == menubarScreen || IsMavericksOrLater()) {
+    // If screens have separate spaces (only applicable in Mavericks and later) then all screens have a menu bar.
+    if (currentScreen == menubarScreen || (IsMavericksOrLater() && [NSScreen futureScreensHaveSeparateSpaces])) {
         int flags = NSApplicationPresentationAutoHideDock;
         if ([[PreferencePanel sharedInstance] hideMenuBarInFullscreen]) {
             flags |= NSApplicationPresentationAutoHideMenuBar;