Add High Contrast theme feature, fully working, posible to extend Big Fonts feature on future
Add High Contrast theme feature, QSS itself
Revert to master
Merge branch 'master' of https://github.com/ninja-ide/ninja-ide into feature/a11y
re sync
Merge pull request #1802 from juancarlospaco/feature/a11y

[a11y] Feature Accesibility High Contrast