Update Finnish translation
Fix DnD of events in Safari
Fix for bug #2129
Merge remote-tracking branch 'origin/master'
Fix typo in unit test
Issue #1829: Fix crash in unrtf library.

Integer overflow in array index leading to unpredictable behavior.
Using correct integer signess and casting fix the problem and turn
negative value into 0. Expected fallback behavior then apply.

Make use of uint8_t since the hash array is a static array of 255 elements.
Improved the documentation regarding filters in SOGoUserSources