Allow the value of logs query args to be retrieved

Needed so that we can check which points type a logs query is for and
then we can set the logs table heading for the points column based on
that.

See #128
Set points column names based on points type

If the points type’s name is non-empty we use that instead of just the
generic translation of ‘Points’.

Fixes #128
Don't translate deprecated messages

Some of these weren’t being translated anyway.

Fixes #130
Merge branch 'issue-130'
Merge branch 'issue-128'