Lightbox improvements

This pr include:

- Remove strange behavior on lightbox forms that mantains data from previous actions.
- Blocking message input handling normalization.
- General lightbox form settings buttons normalization on both behavior and implementation (making it more simple using css instead js events).
- Normalize partial file names for almost all lightboxes.
- Normalize style classes for almost all lightboxes.

Also, it fixes this related issue:
- #872 El formulario de edición en taskboard mantiene los datos al cerrarse

NOTE: I have tested this changes and seems works pretty well, but it can contain regression due to file and style class renames.