Copy the initial, simple tag list as generated by the Opponent constructor to...

Copy the initial, simple tag list as generated by the Opponent constructor to a separate array, and search that on the selection screens. Otherwise it's overwritten by loadBehaviour() and only the tags that apply at stage 0 are searchable.

Take Haru, for example: She has both the small_breasts and large_breasts tags, but not at the same time. Without this fix, she'd appear when searching for either tag, but after selecting her, she'd only appear when searching for small_breasts until the page is reloaded.