Lock descriptors

Descriptors can be locked in the Definition module, effectively rendering the descriptors immune to moving and/or selection. This creates a quasi-layer where some descriptors can be used as a combination of background images and actual display descriptors, for example creating pipes that change color depending on the process value of the objects they are connected to, but which operators cannot select in the Supervise module.

Descriptors can be locked from the right click menu or by using the Property Table View. All descriptors on a diagram can be unlocked using the menu item Diagram -> Unlock All.