Tiled mode doesn't let you zoom in on tiled corners

[KashouC]

If you're using tiled mode in either X or Y or both axes mode, the boundaries of how far from the edges of your image you can be still counts as if we're not using tiled mode, which means you can't zoom in at the edges of the "tiled" parts of the image. The program will simply snap you towards the "true" edge instead.

What counts as the edge for boundary limits needs to be extended to the edge of the tiling.

Aseprite v1.2-beta7
Windows 10 x64