maintain vertical align of arrow when title overflows

[recrwplay]

Also reduces the left padding a bit on subsections and ensures right-padding is enough to stop text overlaying background

[netlify[bot]]

✔️ Deploy Preview for neo4j-docs-ui ready!

🔨 Explore the source changes: 4493735f0b235c50be8929d631bab63a75e22c0d

🔍 Inspect the deploy log: https://app.netlify.com/sites/neo4j-docs-ui/deploys/621fa49a14b49d000773cc38

😎 Browse the preview: https://deploy-preview-92--neo4j-docs-ui.netlify.app