v0.21.0

Overview

• Updated default primitive types #905 #910
• Fixed pointer rename exception #898 #899
• Fixed un-editable custom layer bug #917 #918
• Misc user interface improvements #313 #901 #902 #903 #913 #914 #916 #919

New editor functionality

• Added "export pipeline to single file" for local execution #13 #907 #908 #909
• Added "create new operation from copy" button when alt pressed #797 #900 #911 #912
• Layer insertion between existing layers on connection selection #542 #904