[Feature] Manage all selected nodes (Future Compatibility)

[mkh-user]

In Godot 4.5, We will have ability to select more than 1 node in remote (or in game window), So, I became curious to see the behavior of signal lens in this case.

Testing Procedure:

1. Download version 4.5-Dev 1 (or later).
2. Create a project with several nodes in a scene and connect signals for example.
3. Install and enable Signal Lens.
4. Run the scene and open the Signal Lens panel in the debugger.
5. Select a few nodes (in the game window or the remote tab) and observe the behavior.

This is a project containing a sample scene and the plugin (version 1.3): sandbox-4.5.zip

Observed Behavior:

Signal Lens selects the highest node in the scene for display. This is fine as it confirms that there are no errors or warnings and the plugin is compatible with this feature.

Expected Behavior:

It would be good to have the ability to select from the chosen nodes, so the user could select the node they want, though this is not very important because we have the same functionality for the Remote tab.

Instead, perhaps it would be possible to display all selected nodes simultaneously, although this might be a bit complicated.

Note

This is unlikely to cause a performance drop, as this functionality is now limited to prevent a large number of nodes from being selected.

Otherwise, we could display a warning when multiple nodes are selected so the user knows they are not seeing everything.

[yannlemos]

Good to see you again @mkh-user, thanks for taking a look into this, I was curious myself but hadn't gotten the chance to look into it yet.

We can start with the warning for the next update, but I plan to look into multi-node inspection in the coming months, perhaps tying it into 4.5's release. I'll update this thread if I have news about it.