Merge branch 'sev/legacy_char_replacement' into 'master'

Legacy Character Replacements

This is a minor issue, sorry for the bother. AFAIK, there are two remaining uses of legacy characters,
which are blurry and do not support drop shadows:

- The >>> downloading sign on the scoreboard
- The ... used in front of trailing chat message lines (if the chat message exceeds one line)

This branch replaces the dowloading sign with a proper Unicode character.

However, I did not manage to find where the chat "ellipsis" is defined.
I assume the legacy character is U+E007 (\xEE\x80\x87), to be replaced with a periodcentered U+00B7 (\xC2\xB7), or a plain period. Yet I had not luck grepping my way through qcsrc and darkplaces.

See merge request !67