v4.5-r3

What's Changed

• add default completion option "view" by @bluetom in #62
• Sort lang strings basic codestyle fixes and remove duplicated heading by @NinaHerrmann in #50
• Fix error notification by @geichelberger in #51
• New subtitle support by @ferishili in #49

Full Changelog: v4.5-r1...v4.5-r3