Fancy Skin Background is full of compression artifacts

[passing]

Describe the bug
The background picture of the fancy skin looks quite bad and when increasing the window size that gets even worse

To Reproduce
Open Jamulus

Expected behavior
Shiny look

Operating system
Linux

Version of Jamulus
Built from latest github source

Screenshots

I have already created a new background which takes over the basic design and just gives the panel a nice finish. The new image also has a higher vertical resolution which makes it look much better when increasing the window size:

[DominikSchaller]

Thank you! This has been bothering me for a long time now.

[AndyMcProducer]

Would be awesome if peeps could just load up their own image, textured background etc. People love to customize, makes it more their own.
Also the HQ background is much nicer looking, looks less cheap now.
Maybe an option to tile or stretch if you did allow any background in the future.