Make non-bundled apps work on recent macOS versions

Currently non-bundled apps don't work on Catalina and Big Sur and what's
worse is that old the code makes it impossible to make it work in user
code.

Remove the old workaround, and replace it with an alternative one, which
seems to work under all supported macOS versions and is also used by
Tcl/Tk.

Closes https://github.com/wxWidgets/wxWidgets/pull/2216

src/osx/cocoa/utils.mm

@@ -72,6 +72,25 @@ void wxBell()
     wxUnusedVar(notification);
     [NSApp stop:nil];
     wxTheApp->OSXOnDidFinishLaunching();
+
+    // We need to activate the application manually if it's not part of a
+    // bundle, otherwise not only it won't come to the foreground, but under
+    // recent macOS versions (10.15+), its menus simply won't work at all.
+    //
+    // Note that we have not one but two methods to opt out from this behaviour
+    // for compatibility.
+    if ( !wxApp::sm_isEmbedded && wxTheApp && wxTheApp->OSXIsGUIApplication() )
+    {
+        CFURLRef url = CFBundleCopyBundleURL(CFBundleGetMainBundle() ) ;
+        CFStringRef path = CFURLCopyFileSystemPath ( url , kCFURLPOSIXPathStyle ) ;
+        CFRelease( url ) ;
+        wxString app = wxCFStringRef(path).AsString(wxLocale::GetSystemEncoding());
+        if ( !app.EndsWith(".app") )
+        {
+            [NSApp setActivationPolicy: NSApplicationActivationPolicyRegular];
+            [NSApp activateIgnoringOtherApps: YES];
+        }
+    }
 }
 
 - (void)application:(NSApplication *)sender openFiles:(NSArray *)fileNames
@@ -287,50 +306,6 @@ void wxBell()
 }
 @end
 
-
-// more on bringing non-bundled apps to the foreground
-// https://devforums.apple.com/thread/203753
-
-#if 0 
-
-// one possible solution is also quoted here
-// from https://stackoverflow.com/questions/7596643/when-calling-transformprocesstype-the-app-menu-doesnt-show-up
-
-@interface wxNSNonBundledAppHelper : NSObject {
-    
-}
-
-+ (void)transformToForegroundApplication;
-
-@end
-
-@implementation wxNSNonBundledAppHelper
-
-+ (void)transformToForegroundApplication {
-    for (NSRunningApplication * app in [NSRunningApplication runningApplicationsWithBundleIdentifier:@"com.apple.finder"]) {
-        [app activateWithOptions:NSApplicationActivateIgnoringOtherApps];
-        break;
-    }
-    [self performSelector:@selector(transformStep2) withObject:nil afterDelay:0.1];
-}
-
-+ (void)transformStep2
-{
-    ProcessSerialNumber psn = { 0, kCurrentProcess };
-    (void) TransformProcessType(&psn, kProcessTransformToForegroundApplication);
-    
-    [self performSelector:@selector(transformStep3) withObject:nil afterDelay:0.1];
-}
-
-+ (void)transformStep3
-{
-    [[NSRunningApplication currentApplication] activateWithOptions:NSApplicationActivateIgnoringOtherApps];
-}
-
-@end
-
-#endif
-
 // here we subclass NSApplication, for the purpose of being able to override sendEvent.
 @interface wxNSApplication : NSApplication
 {
@@ -353,16 +328,6 @@ void wxBell()
     return self;
 }
 
-- (void) transformToForegroundApplication {
-    ProcessSerialNumber psn = { 0, kCurrentProcess };
-    TransformProcessType(&psn, kProcessTransformToForegroundApplication);
-    
-    [[NSRunningApplication currentApplication] activateWithOptions:
-        (NSApplicationActivateAllWindows | NSApplicationActivateIgnoringOtherApps)];
-}
-
-
-
 /* This is needed because otherwise we don't receive any key-up events for command-key
  combinations (an AppKit bug, apparently) */
 - (void)sendEvent:(NSEvent *)anEvent
@@ -391,20 +356,6 @@ bool wxApp::DoInitGui()
     if (!sm_isEmbedded)
     {
         [wxNSApplication sharedApplication];
-        
-        if ( OSXIsGUIApplication() )
-        {
-            CFURLRef url = CFBundleCopyBundleURL(CFBundleGetMainBundle() ) ;
-            CFStringRef path = CFURLCopyFileSystemPath ( url , kCFURLPOSIXPathStyle ) ;
-            CFRelease( url ) ;
-            wxString app = wxCFStringRef(path).AsString(wxLocale::GetSystemEncoding());
-            
-            // workaround is only needed for non-bundled apps
-            if ( !app.EndsWith(".app") )
-            {
-                [(wxNSApplication*) [wxNSApplication sharedApplication] transformToForegroundApplication];
-            }
-        }
 
         appcontroller = OSXCreateAppController();
         [[NSApplication sharedApplication] setDelegate:(id <NSApplicationDelegate>)appcontroller];