Crash from auto crash report system.

[Roman Telezhynskyi]

If select tool and then delete another point program will crash. Because tool was not canceled visualization was not deleted from scene before full parsing. After full parsing we canceled tool and tool try delete already deleted visualization. This crash program.

This issue have all tools that have visualization.

[Former user]

Fixed issue #214.

→ <<cset 975dddd474c0>>