Post Icons row woes

[Caiman]

I have uploaded some new post icons which are somewhat wider than the default ones. I also have my main style set to a width of 800px.

While the icons display fine when posting a new reply (advanced mode), the box which contains them is too wide when writing a PM (see

)- basically I just want to change it so that it shows only 5 icons per row instead of 7, any help appreciated