.tsx (typescriptreact) should show React icon

[mlntr]

Following on from microsoft/vscode#118162. Currently .tsx shows the regular .ts icon. Using the React icon instead will help distinguish between .ts & .tsx files more easily.

Also IMO *.test.ts (and *.spec.ts) icon shouldn't be yellow as that's confusable with JS files (*.test.js uses orange which would be better)

[zkldi]

Also IMO *.test.ts (and .spec.ts) icon shouldn't be yellow as that's confusable with JS files (.test.js uses orange which would be better)

Just wrote a PR for this part under #611 as I was similarly confused by it.

[orta]

This is in