Tile grid in picture editor

Will be nice to have configurable tiles grid option for picture editor.

In configure:

  • Show/hide grid
  • grid type:
    • lines
    • dotted
    • corner dots (only on crossing points)
  • lines height (in px)
  • lines color (RGB)
  • grid size (by X & Y separated, if it possible to make non-square tilemaps)

Technically i see this as new "layer" in editor, sized to image with simple drawing functions.