Is Coloreador de Séneca safe?

Adds grading-table formatting and spreadsheet-copy tools to Séneca evaluation pages.

This extension changes Séneca evaluation screens by coloring grades, compacting tables, adding pass-rate summaries, and showing counts of failed subjects and averages. It can add buttons for copying summary data to a spreadsheet, automatically copy certain evaluation or dropout data to the clipboard, support black-and-white printing, and fill blank grade fields with a chosen value.