Various engine improvements – editing collections in editor, Tiled fix for multiple t

[DP News-Robot]

Thanks to Trung Le (Kagamma), you can now use collection editors in Castle Game Engine Editor just like in Lazarus. This allows to visually edit e.g. particle effect anchors in cge-3d-particle-emitter or a TDbf.FieldDefs from castle-db-aware-controls. Thanks to Matthias (Free Pascal meets SDL), we have an important Tiled bug fixed — in case you used …