v3.0

• Add side panel with video preview by @trots in #2
• Add HTML export by @trofim4ik in #3
• Add video tags displaying by @trots in #6
• Add Authors dialog by @trofim4ik in #8
• Fix initial columns size by @trofim4ik in #4
• Fix sorting on published date and video duration by @trots in #5

Full Changelog: v2.0...v3.0