Tile Viewer uses VRAM addresses

[MarioFanGamer]

The tile viewer has got some shortcut buttons for all layers to jump to the layer's tile source and GFX format. Except the shortcuts jump to the wrong location by using the raw SNES address (which goes from $0000 - $7FFF) when it should have been doubled to be consistent with tile viewer addresses (which go from $0000 - $FFFF).

For example, if the BG1 tiles start from VRAM $4000, the tile viewer jumps to $2000 instead of $4000 as expected.