when copying a uiGroup that is on a uiTab, it keeps its ‘owner’ uiTab and
tab index, even if copied to the workspace. these attributes have to be
deleted, or on next load of project, the new groups will have jumped
back into the original uiTab.
confirmed behaviour for groups. could be the same for uiTabs, and
possibly combos too.
sliders and other components seem ok if you copy them onto the workspace.
(it clear this entry) – but the tab index usually stays.