Fixing " X11 Error: BadMatch (invalid parameter attributes) " Error on MatterControl in Linux

Thank you @CAHbKA-IV for this fix

This should fix the "X11 Error: BadMatch" error that some Linux users get with MatterContorl

• Find MatterContorl's appsettings.json file, typically /usr/lib/mattercontrol/appsettings.json
• Open in appsettings.json in your favorite text editor.
• Change Color and Depth parameters to "24"

Should look like this:

  "Color": 24,

  "Depth": 24,