Attempt to reflect changes in the repository more directly in the class ...

...path

You could easily get into a situation in bndtools that you need to prod bnd files or source files to get the project to compile correctly.

1) Refreshing the repositories will now always refresh ALL class path containers. This is either the refresh on the repos window or the top level menu.

2) Executing a menu or a drop operation will refresh that specific plugin

Signed-off-by: Peter Kriens <peter.kriens@aqute.biz>