Bugfixes/Improvements

• [Crash] Fixed crash which occured in some rare cases when user changed Settings related to Send Input #EA-373 by Godhunt
• [Image/Color/ML Search] Fixed a problem with dissapearing Effects #EA-377 by linqse and Rowenor
• [BehaviorTree] Added "Clear all variables" to Behavior Tree blackboard #EA-374 by linqse