Recommended update for kopano-webapp

This update to kopano-webapp fixes the following issues:

Update to 3.3.1, the version originally included in Leap 42.3 was a git snapshot. This also includes upstream bug fixes:

* Improve webapp presence cache by making it hash-based
* Various UI bugfixes
* Contact and business card bug fixes

Fixed bugs
bnc#1051351
kopano-webapp: upgrade from 3.3.0.80 to 3.3.1
Selected Binaries
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