- add more element icons. now element icons is not problem.
- change icon load strategy. now icon is loaded outside plugin. this operations might slow down blender but now I can apply my custom map to some operators to get better using experience.
- use new element icons to decorate some group name to let user know what this group stands for.
- add edit mode switch before bm export to prevent potential error
- let the default value of ZBuffer in Virtools Material become True
- fix the issue that duplicated elements adder do not understand enable option.
- add tunnel section creation and re-organise rail creation menu.
- allow duplicated elements (Nong xxx) creation for some special, such as Fan and Extra Point.
- update enum prop into radio button display mode in bmx export and group name selections
- move rename system into outline window right click menu.
- add grouping operator to object menu in outline window.
- add support of 4 alpha fields intorduced in BM spec recently.
- optimize material creation functions argv passing strategy.
- change related func calls of (2).
- optimize material parameter pick code to reduce useless check.
- split blender material creation function.
- allow user to apply virtools material to blender nodes in operator.
- add quick group picker in add virtools group operator.
