- 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.
- try setting center alignment for add floor popup operator. it is not center alignment now because blender's impl but it is better than previous layout.
- add some components icon for more directly visual.
- add height re-calc in derived block generation for fixing height issue when re-use Flat in sink platform.
- finish all wide floor prototype.
- finish all platform prototype.
