Hints for krusader in main

Hints

• asv-screenshot-media-url-not-secure
  org.kde.krusader.appdata.xml:457 - http://kde.org/images/screenshots/krusader.png
  Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-url-not-secure
  org.kde.krusader.appdata.xml:454 - http://docs.kde.org/development/en/extragear-utils/krusader/index.html
  Consider using a secure (HTTPS) URL for this web link.
• asv-url-not-secure
  org.kde.krusader.appdata.xml:452 - http://www.krusader.org/
  Consider using a secure (HTTPS) URL for this web link.
• asv-description-first-para-too-short
  org.kde.krusader.appdata.xml:74 - Krusader is an advanced twin panel (commander style) file manager
  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.