app: [macOS] activate app on ActionRaise if necessary

Calling window.Perform(system.ActionRaise) does not show the window on
the top if the app is currently not active. This can happen for example
if the app integrated with systray (https://pkg.go.dev/fyne.io/systray)
where the menu item launches a window, the window is not showing at the
top. It is fixed by activating the current app if necessary.

Signed-off-by: Siva Dirisala <siva.dirisala@gmail.com>

app/os_macos.go

@@ -192,6 +192,10 @@ static CFTypeRef windowForView(CFTypeRef viewRef) {
 }
 
 static void raiseWindow(CFTypeRef windowRef) {
+	NSRunningApplication *currentApp = [NSRunningApplication currentApplication];
+	if (![currentApp isActive]) {
+		[currentApp activateWithOptions:(NSApplicationActivateAllWindows | NSApplicationActivateIgnoringOtherApps)];
+	}
 	NSWindow* window = (__bridge NSWindow *)windowRef;
 	[window makeKeyAndOrderFront:nil];
 }