v0.18.0

• reword the readme and config key notes in plain terms
• draw comment threads as reply blocks in two lanes, fold earlier replies, cap card width
• keep the cursor on its line and screen row when the diff context changes
• rewrite key and command descriptions in plain words
• highlight lens reference previews, cut their indent and keep file names in view

Full changelog: v0.17.0...v0.18.0