432436 mostly working add/edit/remove maven runtime wizard WIP

... also got rid of global settings nonesense, it was only used to
calculate local repository location afaict, which does not make
much sense, and significanly complicated maven installations
preference page.

Change-Id: I5d0edcbb2cd905ddbf6c174645591ceeccc87aa8
Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
25 files changed