Inserting opcodes shows wrong jump-destination highlights

[Col-E]

When inserting new opcodes, it seems the highlighted opcodes are offset by how many new opcodes there are. The issue is fixed by closing and reopening the method opcode list.

To Reproduce
Steps to reproduce the behavior:

1. Insert an opcode, like GOTO
2. Select it and notice the destinations are wrong

In this picture the highlighted lines are shifted down by one. The mark function in this case successfully identifies opcode 4 as the fail-case, and opcode 17 as the jump destination. However, the node that receives the CSS class is wrong.