Idea: changing the profile matrix editor to something more useable considering large topologies

[grdw]

Whenever I try to create a LES with a really big topology my browser hangs some time and eventually it will render the really big profile matrix editor, which is than unmanageable due to it's slowness.

However, fear not, I have an idea that might solve this.

What if after hitting continue on the import screen, you'll go to a page where you'll see your selected topology with all but the end-nodes 'clickable'. When clicking an end-node you can edit the technologies that are attached to that single node. Also technically; it would be nice if you only fetch/save that bit of the technology profile (all technologies under end-node-x).

The only problem with this setup is enabling/disabling your concurrency settings. Maybe we can still change them but it's not clear than that you also changed the technologies which are under other nodes.

[grdw]

Related: #747