Use event delegation to reduce number of event listeners

[beru]

@lutzroeder

can you provide some context how to reproduce this issue.

• EfficientDet-d0.onnx file in EfficientDet-d0.onnx.zip can be used to test performance of the program with lots of nodes/edges.
• I've noticed that opening/closing speed of FIND side bar is somewhat slow with such models.
• Reducing number of event listeners doesn't solve the problem. Using Virtual List would be needed.
• It looks like JS Heap comsumption is reduced with the change.
  comparison

Before

After

Can you test the change in different browser and desktop environments.

I've just tested with Firefox Browser 129.0 (64-bit) on Windows 10 22H2 and the change works fine. Noticed that graph scrollbars doesn't work well on Firefox (#1258) but that's a different problem.

I'll test the change on Linux later. Tested the change on Ubuntu 24.04 LTS. It works fine.

[lutzroeder]

@beru can you rebase to main and resolve the build issues?