GUI:
- implemented properly a frame limiter;
- fixed not saving settings for bilinear filtering.

Board:
- implemented mapper 5 (ExROM - MMC5);
- implemented mapper 58;
- implemented mapper 72 (Jaleco JF-17);
- implemented mapper 92 (Jaleco JF-19);
- implemented mapper 174;
- implemented mapper 184 (Sunsoft-1);
- implemented mapper 213;
- implemented mapper 242.