Possible XSS attempt

We've discovered this in the logs:

```
admin.php?page=slimview1&fs[resource]=equals+u/K?YY_XK?_?P??[???њ[_???QK???KT_??ܘ[KX[?_Q[_Y?X?[_]_KQ?ZY_[_[??L?_?__??_OY[??_?_L??̍L?P??ь?QP?_Q?АQQ???_P?Ќ?L__M_?__
```
Seems like an XSS attempt.