1.5.1

• Fixed visual feedback when painting tiles in a Tile layer with "Asynchronous render" enabled.
• Fixed a crash when creating a new World.
• Updated macOS icons.
• Fixed "Kill Tiles" layer option to work as intended with IntGrid layers.
• Fixed a minor visual bug with neighbour levels rendering.
• Fixed support for layer opacity settings in neighbour levels rendering.
• Fixed a render bug when resizing levels.
• Fixed WorldDepth value in automatic level names pattern.
• Various minor optimizations.
• Various UI fixes.