EFA#143 EfaConfig should get rid of the nested tabpanes #307
Description
Efa provides a lot of configuration parameters, which are automatically rendered into a set of nested tabbedpanes.
This is not very user friendly, in special when it comes to the configuration of widgets.
Also the user is not very likely to find the desired configuration item instantly.
So efa should use a more modern attempt to organize its config panes.
Also, the user should be able to search for options, based on their displaytext and also data.