Release Version 1.2.1

What's Changed

• Add basic gh page by @XanatosX in #112
• Add first github page content by @XanatosX in #113
• Add config file for gh pages by @XanatosX in #114
• Add gh apges config by @XanatosX in #115
• Add link to new user manual by @XanatosX in #117
• Fix windows which are not closeable via hotkey by @XanatosX in #120
• Prepare Release version 1.2.1 by @XanatosX in #121

Full Changelog: 1.2.0...1.2.1