[DMU] Light Editor  + Checkstyle :
   - Simplify LatestConfigSpec.filterConfigSpec(PartMaster)
   - Replace App.log() in worker by if(debug){console.log()}
   - Add Light color picker in debug mode
[DMU] Pretty Debug Log + Collaborative Load fix :
   - App.log have typeColor
   - Parts_Tree_View unload part before load new
[DMU] Layer text in PlaceHolder :
   - fix #335
   - CheckStyle