2.27 Pre-release 1

Hey it's been a bit, this is a pre-release.

• Code cleanup, removing unused code stuff.
• Changed the single-instance form activation when trying to open another instance, should work (tm). This doesn't activate each other between versions, this is a hard cutoff from the previous method. Not important for end users, but important if you maintain using multiple versions.
• Fixed exceptions "github" button linking to youtube-dl's repo instead of mine. Sorry.
• The language class got more optimized, it might be faster and use less system resources, now.
• Conversion got absolutely changed. it pops up a form, like the download form. File merging should follow soon-ish.
• Update checking got somewhat changed, exceptions occur with more information based on the exception.

The language file was updated for this pre-release. I don't expect to add more or change them, but i don't know. I usually prefer to release them when the new version comes out, because it's safer in case i rename something.

Anyways... yeah.

(Binaries were updated to include the 5 commits after release)