Brief summary of issue / Description of requested feature:

see Title

Steps to reproduce the issue / Reasons for adding feature:

1. open new Profile
2. set some borders in the settings. for example settings->main display-> border left/right to 100
3. use lua setBorderColor(0,0,255)
4. border color is not changing or getting white

Error output / Expected result of feature

Expected result in this case would be a blue border.
This is still working in Mudlet 4.10.1

Extra information, such as Mudlet version, operating system and ideas for how to solve / implement:

Latest PTB
Ubuntu 20.10