Safari 12 on osx tree view scroll position changes

[pixtron]

Describe the bug

When the first time a node is selected, the scroll position of the tree view "jumps" up.
The problem only occurs if the tere view contains enough nodes, that it is scrollable.

To Reproduce

1.) login to balloon
2.) click on a node

Expected behavior

The tree should not jump

Environment

• web-client version: 3.2.x-dev
• balloon server version: N/A
• Deployed as: N/A
• client os: OSX 10.14.3
• browser: Safari 12.0.3 (14606.4.5)

Additional context

Add any other context about the problem here.

[pixtron]

The problem occurs whenever the kendoTreeView is focused. Initially it can be disabled by calling focus() on the tree view.