refactor: Clean up golden-layout css

[mattrunyon]

Reverts #1334

Applies #1322 w/ a fix for enterprise builds

Still seems to need the ignore in karma.config.cjs though. Probably because the golden-layout package tests use old libraries

[dsmmcken]

Was the change to simply move it adjacent to the .js rather than in the /scss folder?

[mattrunyon]

Also had to add ./src:./dist to the build:sass for golden-layout so that the module would be compiled to GoldenLayout.module.css

The reference to ../scss would always point to scss, but we convert the imports to css for distributed files. The only scss files we publish are the base stylesheet/themes as those are intended to be consumed in other scss files in enterprise/code-studio

[mofojed]

Not sure I full understand this. The ./dist/GoldenLayoutThemeExport.js file that's outputted has a css import, not an scss import - so what's being ignored here specifically?

[mattrunyon]

This was from the original PR, but I think it is skipping this file instead of trying to bundle it with browserify which I guess doesn't like the CSS import? Idk, but I tried removing it and the tests failed.

[mofojed]

@dsmmcken Are all the updates screenshots correct? Looks like things shifted horizontally by a couple pixels

[mattrunyon]

The screenshots should be from the original PR. I just reverted the revert commit then added the fix on top of that.

[dsmmcken]

Screenshots are correct.

1. drag proxy tab right border edge was changed.
2. overflow of placeholder text was fixed.