adapt to dark theme : layout, grid
dark theme : all widgets except linear-gradiant, optimizations
original theme : some changes no test
dark theme : step 1 finished with the known issues
issue : form on original theme and dark theme
without css files
Dark theme - manually merged pull request #31 (from @blr21560)

Here is the link to the pull request:
https://github.com/vitmalina/w2ui/pull/31