Hello ... I thank all the comments, with these suggestions I tried to 
deactivate all the components and activate one by one and verify which one 
is causing the problems, with this:
- When activating Component - WorkLog 1.0.dev0 and loading the ticket page, 
the error Error - TypeError: $ .browser is undefined in the jqModal.js file 
(line 59, col 27)
- Error of not showing the comment buttons was the TracDynamicFields 
component;

Modify grid items
- Disabling the TracHoursPlugin 0.6.0.dev0 component started working 
correctly.

I'll have to look for the components TracHoursPlugin 0.6.0.dev0 and WorkLog 
1.0.dev0, TracDynamicFields will not use any more.

Em terça-feira, 24 de janeiro de 2017 13:22:27 UTC-2, RjOllos escreveu:
>
> Any Javascript errors in the console have a good likelyhood of preventing 
> execution of the code that makes the buttons visible on hover.
>

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