Describe the bug
When I open preferences window in the IDE, the already selected theme is Light (Arduino), although the active theme is Dark (Theia). When I click OK, suddenly the theme Light (Arduino) becomes active.

To Reproduce
Steps to reproduce the behavior:

1. Open IDE
2. Change theme to Dark (Theia) using command pallete (F1) if it is not active
3. Open preferences
4. Field Theme's value is Light (Arduino)

Expected behavior
The Theme field in preferences should be the same as active theme

Screenshots
image

Desktop (please complete the following information):

• OS: Windows 10 1809
• Version: 2.0.0-beta.3
  Date: 2021年02月26日T10:48:13.025Z
  CLI Version: 0.16.1 alpha [76f55490]