Production Pro Theme 1.1.1

Scene grid mode fixed.
Small fixes.

Thanks to @neilis for the report.

Update for the new 31.0 version.

Small color fixes in the transition properties.

Updated to the new theme system.

Added 2 new styles: Flat Dark and Yami Colors

Flat Dark have the same colors than Original Dark, but with flat buttons.

Yami Colors have flat buttons and the original Yami theme colors.

Changes in 0.2

Fixes for Source Dock plugin
Fixes/improves in grid mode
Fixed text alignment in Media Controls plugin