Importing customCss after githubMarkdownCss files & and removing !important

[EvitanRelta]

VSCode has updated their Typescript version, which added the feature to prevent organizing specific imports (like CSS overwriting files that needs to be imported last).

Quote from the Typescript PR:

when organizing imports in each block of newline-contiguous

import c from "C";

import d from "D";
import a from "A";
import b from "B";

turns into

import c from "C";

import a from "A";
import b from "B";
import d from "D";

Thus, we can now properly import the customCss files after the githubMarkdownCss files, and remove unnecessary !important CSS property that was previously needed.