Resolve "Increase client test coverage"

.gitlab/client.gitlab-ci.yml

.vscode/tasks.json

client/package-lock.json

client/package.json

client/public/logo192.png

client/public/logo512.png

client/public/manifest.json

client/src/actions/competitionLogin.test.ts

client/src/actions/presentation.test.ts

client/src/actions/presentation.ts

client/src/components/TestConnection.tsx

client/src/e2e/AdminPage.test.tsx

client/src/e2e/LoginPage.test.tsx

client/src/e2e/TestingConstants.ts

client/src/index.tsx

client/src/logo.svg

client/src/middleware/Middleware_Explanation.txt

client/src/pages/admin/AdminPage.tsx

client/src/pages/admin/competitions/AddCompetition.tsx

client/src/pages/admin/competitions/CompetitionManager.tsx