Check and fix magic numbers in Tree & Table

[akoch-yatta]

Description
One examples where you see an effect is the indentation in Tree after the leading Image seems to be smaller in higher zoom levels as expected. Reason is probably the static variable Tree#INDENT is used with pixel calculations at some places without being upscaled. As in Table and Tree are multiple magic static numbers, scope of this ticket is to check chose and scale them up where necessary:

Tree

Table

Reproduction
Just open a Package Explorer and you will see that the relation between image and text will get smaller - hard to see on the screenshots, but for completeness:
100%

200%

Expected Behavior
The magic numbers should always be stored in points and scaled up to pixels where necessary

Necessary configuration:

Additional knowledge