Fix for #1497 - What is the purpose of the "--" language?
Backing out: don't select any language pack for download by default in the update languages page
Fix for #1497 - What is the purpose of the "--" language?

Remove the "--" option
Merge branch 'fix1497' of github.com:b3b/ka-lite into develop

Conflicts:
	kalite/templates/base.html