Operation Prs is corrected: 1. to be not visualized if the module can not display the feature of the presentation[e.g. sketch sub-entity creation, when the mouse is not over viewer]; 2. Call redisplay of the presentation by the REDISPLAY/CREATE message, instead of doing that by the UPDATE message.
Correction in selection processing, cased by #26658. Scenario: Create two lines in the sketch, start Distance constraint, Click in the common point of lines three times[without moving], the result is that both distance attributes are filled with the same value. However there is a filter that prohibits this.
