[571842] Allow expanding subapps in typed subapps and viewers

This fix correctly creates the edit parts for expanded subapps in the
root node of typed subapps and subapp viewers.

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=571842
Change-Id: I04934023223136ddb7798f4d786d5c146a97e2ce
Signed-off-by: Alois Zoitl <alois.zoitl@gmx.at>
8 files changed