Hints for onionshare in main

Warnings

• screenshot-download-error
  Error while downloading screenshot from 'https://raw.githubusercontent.com/micahflee/onionshare/master/screenshots/appdata-onionshare-share-server.png': URL was not found on the server.
  This might be a temporary server issue, or the screenshot is no longer available.
• screenshot-download-error
  Error while downloading screenshot from 'https://raw.githubusercontent.com/micahflee/onionshare/master/screenshots/appdata-onionshare-share-client.png': URL was not found on the server.
  This might be a temporary server issue, or the screenshot is no longer available.
• screenshot-download-error
  Error while downloading screenshot from 'https://raw.githubusercontent.com/micahflee/onionshare/master/screenshots/appdata-onionshare-receive-server.png': URL was not found on the server.
  This might be a temporary server issue, or the screenshot is no longer available.
• screenshot-download-error
  Error while downloading screenshot from 'https://raw.githubusercontent.com/micahflee/onionshare/master/screenshots/appdata-onionshare-receive-client.png': URL was not found on the server.
  This might be a temporary server issue, or the screenshot is no longer available.