BlueGalaxy table thead sticky and sorting must be three-states option

[valimaties]

Hi. It is better that in every table the thead to be stiky, it is a better visibility to each of the data, to see the column's names. Adding this css in boxes.css file seems to do the job:

thead {
    position: sticky;
    top: 0px;
    z-index: 1;
}

and removing the background-color: transparent; from .foe-table, table.foe-table classes.

However, the issue I see here is with sorting options which must be a three-states soting option (ascending, descending and not-sorted). So, as I see, there is an event which changes the th class of the table, which will add the ascending descending classes to the th clicked. I suggest to remove the class name descending if exists without adding the ascending. This will do the three-states sorting. When you first click on the header will add ascending. If ascending is present, then will remove ascending and add descending. If descending is present, remove descending without adding ascending.

[outoftheline]

the foe-table class is used for so many things. would need to check if it breaks on any module.