Add plugin information in About window

Document → https://wiki.idempiere.org/en/NF6.2_Manage_Plugins_WebUI

Thanks for the permissions. I tested your patch and twitted https://twitter.com/adempiere/status/938610322281177088
It seems good enough as it is, so why not put into core?

The proposed patch just shows the plugins, implementing start/stop is just an idea.
The new tab is just shown for administrator users (like SuperUser or System)

It's user accessible to start/stop plugins?

implement a first version of this feature.

It shows a new tab in About window, like this:

Pendings:

• make table sortable

• make default size of columns more appropriate to the data

• add buttons (or right-click menu) on each row to allow stop/start/update/uninstall

  • this is about calling something like ctx.getBundle(id).start() on the bundleid of the row

• maybe add button on top to allow installing a new package (like felix console) ?

If you like the idea, help to finish it is welcome.