Refactoring, workflow speed-up

This release should speed up workflow (around 15% on my tests), improve responsiveness

Translate v1.2.0 release

• show synonyms for the translated text

Translate v1.1.0 release

• show spelling suggestions
• autocomplete spelling results with Enter

Translate v1.0.0 release

• autodetect translate direction, no need to specify the source language
• can translate both single words and whole sentences
• translate text selected in MacOs (with ^⌥⇧⌘ + T hotkey)
• copy translation results to the buffer