Add TextureGenerator boilerplate
TextureControlWidget poc
Fix NRE in SpriteRenderer when texture is null
TextureControlWidget creates a child ResourceControlWidget instead of trying to be one
Draw texture preview
Standardize internal way to async replace placeholder textures
Add Sandbox.Utility.ForAsync
TextureGenerators are async
Add IPopupEditor<T>, EditorUtility.OpenControlSheet looks for this interface when creating a popup
Rename ControlSheetPopup to PopupEditor, make more modular so we can override important bits
Add TextureEditorPopup
Clean up TextureControlWidget
Add Color.Rgba16 (half based color)
Add Bitmap class
More bitmap stuff
Bitmap draw and bitmap pen
Bitmap drawing fixes
Bitmap clone, IDisposable, IValid