P-UI: Fast language / theme / server selection (#5301)

* added language toggle component

* added language and theme controls onto start page

* moved host selection out of auth

* optimized rendering

* make server option less obvious

* changed EditButton save symbol

* longer welcome text

* removed ColorToggle color schema

* reduced code

* disabled host selection when options are changing

* fix type error

* use GH reporter

* fix tests?

* compile frontend

* fix assertation

* revert unneeded change

* split up into more components

* separated functions / use cases for LanguageToggle more

* moved color toggle to profile

* moved language out of main menu into profile

* remapped settings link

.github/workflows/qc_checks.yaml

@@ -414,7 +414,7 @@ jobs:
       - name: Set up test data
         run: invoke setup-test -i
       - name: Install dependencies
-        run: cd src/frontend && yarn install
+        run: inv frontend-compile
       - name: Install Playwright Browsers
         run: cd src/frontend && npx playwright install --with-deps
       - name: Run Playwright tests