Improve digital signature

• Update Sparkle and app digital signatures by applying codesign to the compiled bundle
• Improve the Spanish translation of Sparkle dialogues
• Bump version to 4.3.0 (1625)
• About.This.Hack-4.3.0-glass.zipis a version with translucent windows
• Glass version: apply translucent effect to language selector and about dialog
• About.This.Hack-4.3.0-nosparkle.zip is a version without Sparkle updater