A small change in the list title and review pt_BR translation

[leandrocunha526]

When "no task list" appears listing the lists below the title, the negation doesn't make much sense and yet I removed that negation.

Along with this change, the Brazilian Portuguese translation file was revised, the necessary changes were made, such as adding credit to Guilherme Berbet and the update was made following some lines of the file.

[leandrocunha526]

Now:
With negation and tasks lists presents.

PT: Sem listas de tarefas
EN: No Tasks Lists

With this merge request:
No negation and tasks lists presents.

[rffontenelle]

Changing manually the POT file doesn't make sense, as POT files are generated based on the translstable strings in the source files.

Please make sure to change the source and regenerate the POT instead.

[leandrocunha526]

Changing manually the POT file doesn't make sense, as POT files are generated based on the translstable strings in the source files.

Please make sure to change the source and regenerate the POT instead.

It was edited to remove just one "no". If we regenerated the file this no could appear again and that is what may have happened in this case. This "no" was not supposed to exist.
I'll look at the source later so it doesn't persist.

[mrvladus]

"No task lists" is only appears in status page when no task lists is in sidebar