We can now (again) load and initialize Morphic and tools after unloading it.�

Main problems to solve:
-�Multilingual packages are problematic to load
-�ThemeIcons>>#iconSelectors message finds Object>>#systemIcon too

for simplicity we do not load most of the tests and NativeBoost.

https://ci.inria.fr/pharo-contribution/view/Pharo-Kernel-3.0/job/PharoKernel3.0-FromTopShrink-Reload/

-- Pavel