2 patchs :
https://sourceforge.net/p/codeblocks/tickets/84/Before :

After :

Problem is on column sizing. Best view with small length variable name, large variable value
As I understand goal is to autosize tooltip to minimal size for no overlap and do autofit of column. I first try to digged into "why it won't always work with actual code". I can explain it, but it solution will be a large code overhead to handle this externally. Calling AutoFit() seem best solution
https://sourceforge.net/p/codeblocks/tickets/85/-Add possibility to rename variable with double clic
-Set a limit to watch value size. Here if I try to show a string value with 2ko text, it will fail and show an empty tooltip. Full watch value remains available with others tools of Watches
128 char is an arbitrary length ...