[Feature] More easily select allowed sets for character in relic tab

[thailyn]

Motivation

When going to the relic tab to try to find potential upgrades for a character, it is tedious to switch back and forth between the optimizer and relic tabs to filter the relic list by the sets allowed in the optimizer tab (since I have not memorized what sets I have selected for all characters).

Goal

Provide some method (e.g., a button, perhaps next to "Clear all filters" button) on the relic tab to select exactly the sets allowed on the optimize tab for the character that is set in the "Relic recommendation character" selection box.

Additional optional features

The main goal listed above is probably sufficient for most cases. I can see some logical extensions to this feature that could be useful, but perhaps too niche to be worthwhile:

• When bringing over allowed sets to the relic tab, also set the "Enhance" and "Grade" filters based on what is chosen in the optimize tab.
• Perhaps something similar can be done for the "Main stats" and "substats" filters, as at least the former can be set in the optimize tab, but those are usually also dependent on the slot. Perhaps have a button or such that would, for example, set the filters for the body slot, which would select only the "Main stats" that are allowed on the optimize page. Or perhaps have a toggle to dynamically update those filters based on what is selected in the "Parts" filter: if only the body slot is selected, allow only that slot's "Main stats". When the user changes to select, say, the feet slot instead, automatically update the "Main stats" filter to select only the feet slot's allowed stats. The ambiguous situation, of course, is if multiple parts are selected. Maybe allow "Main stats" that are allowed on at least one slot? That would, however, show relics the user does not want to see, so it is not a perfect solution.