[i18n] change on IMP italian translation

[Marco]

Hello!
I suggest this change:

From:

	msgid "Quoting %f:"
	msgstr "Def. Quota %f:"

To:

	msgid "Quoting %f:"
	msgstr "%f ha scritto:"

It's the row 3407 of imp/po/it_IT.po, last version.

Thank you
marco