DeskClock: Update italian translation

Change-Id: I1d8a40ec004a0f6493d3f9166ed8e57c7be4fe57
Remove redundant background from ClockFragment

Leftover from commit 7bcc2d8ce2951a8f5451e93a5192b7ae04564de0. Caused
some severe overdraw.

Change-Id: I338e4132c02466eb53bd073433db2b5fbfcb3d1f