It's only useful for people who used the extension and want to do the
verification. People didn't complain about that and nobody really feels
committed to implement that, so let's remove the temporary code until we
really feel the need for it again.

Conflicts:
	wiki/src/press.de.po
	wiki/src/press.it.po
	wiki/src/press.pt.po
	wiki/src/support/learn.de.po
	wiki/src/support/learn.fa.po
	wiki/src/support/learn.fr.po
	wiki/src/support/learn.it.po
	wiki/src/support/learn.pt.po

Rephrased index and title, changed other occurences. Left Desktop as it is in places where the actual desktop is meant