Added support for slope custom max angle for Platformer Objects.
Fixed bug in PlatformerObjectRuntimeAutomatism._isCollidingWith blocking some platformers objects on slopes.
Velocity of physics objects are now kept when their size change.
Adapted dialogs to use gd::SkinHelper for their icons.
Started new Pathfinding extension.
Adapted to changes in GDCore.
Finished new Pathfinding extension.
Removed hshg from PlatformAutomatism (now included by GDJS by default).
Fixed TextObject icon.
Merge pull request #3 from 4ian/New-AStarAutomatism

New pathfinding automatism