cuda_tab_icons: low res icons (and low quality upscaling).

I learned from cuda_tab_icons code (not from “readme”) that I can make tab icons bigger by just specifying size in icon_theme like this: (why no separate option, btw?)

as you can see, @Alexey-T. icons are low res, and upscaling quality is also bad. compare upscaling quality by the browser (more smooth):

also you can see from screenshot that hi res icons are available on the internet, so you can consider to update them to 48x48. (and lexer icons too ??)

look how clock icon will look if I swap it with hi res icon 48x48 (from here https://github.com/os-js/osjs-gnome-icons/)

[Alexey-T]

yes. fixed. looks good now.

[veksha]

i see error. change bgra.Resample(AList.Width, AList.Height); to bgra := bgra.Resample(AList.Width, AList.Height);