[Feature Request]: Hide `Show All Windows` in tray when < 2 windows

### Guidelines

- [x] I have [searched the issue tracker for open and closed issues](https://github.com/FreeTubeApp/FreeTube/issues?q=is%3Aissue+sort%3Arelevance-desc) that are similar to the feature request I want to file, without success.
- [x] I have searched the [documentation](https://docs.freetubeapp.io/) for information that matches the description of the feature request I want to file, without success.
- [x] This issue contains only one feature request.
- [x] I have read and agree to follow the [rules](https://docs.freetubeapp.io/community/rules/).

### Problem Description

When user only has one window in Tray the `Show All Windows` option is visible.

### Proposed Solution

Only show this option when user has >=2 windows in tray

### Alternatives Considered

None

### Issue Labels

improvement to existing feature

### FreeTube Version

Build 7094

### Operating System Version

Windows 11 IoT Enterprise LTSC 24H2

### Installation Method

.exe

### Upload screenshots or videos

_No response_

### Additional Information

_No response_