Show distance on mission screen, sort by distance.
ui:Label color support
Mission screen shows colorful distance and days left.
Translation support
Translation moved to Languages.lua
blank line clean up
fix mission list distance text when in hyperspace

Thanks to @walterar for this fix.
Merge branch 'Mission_list_sort'
run FileSystem::SanitiseFileName on system names before they are exported
Lua now have access to hyperspace target if player's in hyperspace.
Merge remote-tracking branch 'uvs/Mission_list_sort'
Merge pull request #2243 from johnbartholomew/fix-lua-system-export

Use SanitiseFileName on system names before they are exported