Hints for haruna in main

Hints

• asv-description-first-para-too-short
  com.georgefb.haruna.appdata.xml:20 - A Qt/QML video player built on top of libmpv.
  The first `description/p` paragraph of this component might be too short (< 80 characters). Please consider starting with a longer paragraph to improve how the description looks like in software centers and to provide more detailed information on this component immediately in the first paragraph.
• asv-summary-has-dot-suffix
  com.georgefb.haruna.appdata.xml:17 - A Qt/QML video player built on top of libmpv.
  The component summary should not end with a dot (`.`).