I am trying to test wxWidgets 3.1.4 (updated with git).
I have seen, some time ago, that some toolbars in CodeBlocks are too wide with this version but they were correct with 3.1.3 version.
It appeared very soon after the first releases of version 3.1.4 and hasn't changed since.
May be, there is something to tweak in C::B, but I have not found where it is.
See the effects on the 2 images.
gd_on