Diffing two binaries should have side-by-side disassembly when drilled into a specific function

[dmachaj]

I have been doing some binary size analysis to determine where some growth has come from. A certain function increased in size from 3.1KB to 3.9KB. Exactly what part of it grew is not obvious. It would be super helpful if the comparative analysis view of a function had the disassembly for both sides (ideally with highlighting of differences). That way I can see exactly what is different and spend my time making it better instead of spending all my time trying to spot the difference.

In practice I had to open 2 copies of SizeBench in non-comparison view to see the disassembly. This was manual and error-prone and I did not enjoy it.

[jonwis]

I think #54 might help with this, but the diffing is super noisy due to things like offset, relative offsets, etc. We might need to find or invent some better binary diffing engine for cross-binary comparisons.