TabbedPropertyTable may recreate tabs after property changes.
Adding or removing properties (or other statements) seems to sometimes lead to situation, where TabbedPropertyTab recreates its contents, altough selection does not change.
THis beahviour causes Widget is disposed
SWT Excetion in one of Sulca´s property tabs. Th eexception happens very deep in SWT code during the phase, when TabbedPropertyTab disposes it existing content to replace it with new content.
Proper fix to this situation is to prevent TabbedProperyTab recreating its contents, when nothing has changed.