JBoss Tools Runtimes improvements

After the discussion on mailing list we need to fix the current jboss tools runtime page/functionallity.

I've found the following issues in my current testing:

1) The list of links to "JBoss Runtimes" is bad ui - fills up the screen with alot of whitespace (and its Runtimes not runtime)
2) The import/export buttons does not seem to do anything beyound calling import/export dialog.
3) Search has a cancel button but it doesn't do anything
4) Seam webapps seem to be picked up as seam runtimes - is that intended ?
5) Seam inside EAP is not detected
6) Drools inside SOA-P is not detected
7) The import/export of WTP servers seem to be a very bad hack...we probably have to live with it but at least we should try and make our import/export simply wrap the relevant runtimes

Furthermore these settings seem to not persist between workspaces and does not handle the original usecase of having runtimes configured when starting up a new workspace (requiring users to import/export is not the solution)

I'm creating a few subtasks for this to outline the ideas.