Fix and enhance man page

Updated by "Cleanup translation files" hook in Weblate.

Co-authored-by: Weblate <noreply@weblate.org>
Translate-URL: https://weblate.nheko.im/projects/nheko/nheko-master/
Translation: Nheko/nheko

Currently translated at 7.4% (47 of 627 strings)

Translated using Weblate (Spanish)

Currently translated at 7.4% (47 of 627 strings)

Translated using Weblate (Spanish)

Currently translated at 7.4% (47 of 627 strings)

Co-authored-by: Diego Collado <diego@diegocollado.net>
Co-authored-by: Edd Ludd <nrdz4xoo@anonaddy.me>
Co-authored-by: Richard <mpxfsfuv@sharklasers.com>
Translate-URL: https://weblate.nheko.im/projects/nheko/nheko-master/es/
Translation: Nheko/nheko

Co-authored-by: Edd Ludd <nrdz4xoo@anonaddy.me>
Co-authored-by: Weblate <noreply@weblate.org>

This makes them less annoying when scrolling or accessing the popup
menu.

See also #860

Currently translated at 4.6% (29 of 627 strings)

Co-authored-by: LluisE <lluise@tutanota.com>
Translate-URL: https://weblate.nheko.im/projects/nheko/nheko-master/es/
Translation: Nheko/nheko

Completer scrolling

See merge request !20

- Add scrolling
- Only display ~7 items at once

Not only should this prevent hickups, it also fixes a potential crash.

Make nheko usable without a secret storage service

Apply selective clang-tidy suggestions

Currently translated at 100.0% (627 of 627 strings)

Co-authored-by: Linerly <linerly@protonmail.com>
Translate-URL: https://weblate.nheko.im/projects/nheko/nheko-master/id/
Translation: Nheko/nheko