Currently, if a plugin has configurable settings, the plugin author implements the "configure" method, adds a TT template and handles all that, which is quite complex.

In addition to that method, there should be a way to make easier plugin configs:

If there is a "configure.pref" file in the plugin, use that in the same way we use *.pref files for making system preferences, so the plugin author doesn't need to implement anything else.