[v3] Cannot unhide a menu item if it starts hidden

[IanVS]

Description

After the fix for #4077, it's not possible to to unhide (show) a menu item that starts off as hidden.

To Reproduce

In the menu example, add this:

	// Hidden menu item
	hidden := myMenu.Add("Hidden").SetHidden(true)

	// Unhide callback
	myMenu.Add("Toggle hidden").OnClick(func(ctx *application.Context) {
		hidden.SetHidden(!hidden.Hidden())
	})

Then start the example, and click the Toggle hidden menu item. The "Hidden" menu item is not shown (bug).

If you remove the .SetHidden(true) from hidden, then toggling works correctly, both hiding and unhiding.

Expected behaviour

I should be able to unhide a menu item that starts off hidden.

Screenshots

No response

Attempted Fixes

No response

System Details

# System

┌──────────────────────────────────────────────────┐
| Name          | MacOS                            |
| Version       | 15.2                             |
| ID            | 24C101                           |
| Branding      | Sequoia                          |
| Platform      | darwin                           |
| Architecture  | arm64                            |
| Apple Silicon | true                             |
| CPU           | Apple M2 Max                     |
| CPU 1         | Apple M2 Max                     |
| CPU 2         | Apple M2 Max                     |
| GPU           | 30 cores, Metal Support: Metal 3 |
| Memory        | 64 GB                            |
└──────────────────────────────────────────────────┘

# Build Environment

┌─────────────────────────────────────────────────────────┐
| Wails CLI    | v3.0.0-dev                               |
| Go Version   | go1.24.0                                 |
| Revision     | 5059adc561a9613f943bb9bb1e17d55c83717631 |
| Modified     | false                                    |
| -buildmode   | exe                                      |
| -compiler    | gc                                       |
| CGO_CFLAGS   |                                          |
| CGO_CPPFLAGS |                                          |
| CGO_CXXFLAGS |                                          |
| CGO_ENABLED  | 1                                        |
| CGO_LDFLAGS  |                                          |
| GOARCH       | arm64                                    |
| GOARM64      | v8.0                                     |
| GOOS         | darwin                                   |
| vcs          | git                                      |
| vcs.modified | false                                    |
| vcs.revision | 5059adc561a9613f943bb9bb1e17d55c83717631 |
| vcs.time     | 2025-02-16T05:02:25Z                     |
└─────────────────────────────────────────────────────────┘

# Dependencies

┌───────────────────────────┐
| Xcode cli tools | 2409    |
| npm             | 10.9.2  |
| *NSIS           | v3.10   |
|                           |
└─ * - Optional Dependency ─┘

# Checking for issues

 SUCCESS  No issues found

# Diagnosis

 SUCCESS  Your system is ready for Wails development!

Additional context

Discord thread: https://discord.com/channels/1042734330029547630/1334926670070677555/1334926670070677555