[b]Changes[/b]

• Add new "Autocomplete" option [b]On ↲[/b] which enables the return key [b]↲[/b] to always trigger completion, instead of only in certain contexts. [i]The default remains [b]On ↹[/b] using tab to complete.[/i]
• Accept either return key or tab key for completion when triggered manually with [b]ctrl space[/b]. [i]This also works this way after the completion menu has been interacted with.[/i]
• Improve scroll bar mouse interaction. Scroll bars are easier/wider to grab, they visibly expand to 2x width & are highlighted when hovering over them.
• Add missing CJK support in code branch menu.
• Update code dependencies and compile with rust 1.55.