Italian Localization Update

All the strings present in the source are updated.
Merge pull request #1031 from DeRobyJ/stable-1.1

Italian Localization Update
Monstro: optimize
Rewrote handling of modulators so that we don't have to allocate extra buffers for every note - should improve performance and make cpu usage more consistent
Merge pull request #1035 from diizy/stable-1.1

Monstro: optimize
Merge pull request #1036 from LMMS/stable-1.1

sync