Release v0.6.3 — Tab indentation and font fixes

Features

Indent with Tab in the code view: press Tab to insert a tab character, select multiple lines and press Tab / Shift+Tab to indent or outdent the whole block (#123)

Fix the Editor Font setting having no effect in the Minimal theme; your chosen font now applies everywhere, and the "System Default" preset keeps Minimal's serif look (#123)
Fix Code + Preview panes slowly scrolling on their own after you stop scrolling on macOS trackpads (#123)
Fix Tab moving focus out of the editor instead of editing your document (#123)
Fix lists nested with tabs being flattened to a single level when switching between Code and Visual views (#123)

Tab in the visual editor now indents and outdents list items, inserts a tab inside code blocks, and never kicks the cursor out of your document (#123)