improve plane fitting, fix delete state

Assets/Material.mat

Assets/Models/downsampled_trafo.ply

Assets/Models/downsampled_trafo.ply.meta

Assets/Models/tetrahedron_downsampled_trafo.fbx.meta

Assets/Prefabs/Block.prefab

Assets/Prefabs/BlockSelect.prefab

Assets/Prefabs/VertexPoint.prefab

Assets/Scenes/SampleScene.unity

Assets/Scrips/Components/Block/BlockDeform.cs

Assets/Scrips/Components/Quad/FittedQuad.cs

Assets/Scrips/Components/Selection/BlockSelect.cs

Assets/Scrips/Controllers/ProgramController.cs

Assets/Scrips/Controllers/SelectPointsController.cs

Assets/Scrips/Events/SpawnBlockEvent.cs

Assets/Scrips/Utils/PointCloudDataReader.cs

Assets/Scrips/Utils/PointCloudDataReader.cs.meta

.../Settings/Project Configuration/SampleScene.scenetemplate

Assets/Shaders/Mat_RotateAnchor.mat

Assets/Textures/edge-liner.png

Assets/Textures/edge-liner.png.meta