Improve initialization of bone-tree panel
Improve initialization of bone-tree panel

AlloyTeam/AlloyAnimation,AlloyTeam/AlloyAnimation,AlloyTeamDev/AlloyAnimation,AlloyTeam/AlloyAnimation,kerryChen95/boneAnimationEditor,kerryChen95/AlloyStick,AlloyTeamDev/AlloyAnimation,kerryChen95/AlloyStick,AlloyTeamDev/AlloyAnimation,kerryChen95/boneAnimationEditor,kerryChen95/boneAnimationEditor