WeeWX V4.6.1 released

[Tom Keffer]

This dot-dot releases fixes a few minor glitches in the last release:

4.6.1 02/10/2022
Make the show_rss and show_reports flags work properly.  Fixes issue #739.

Added $to_list() utility for use in Cheetah templates.

Fixed a few more untranslated fields in Seasons skin.

Observation types that use the `sum` extractor are set to None if no LOOP
packets contributed to the accumulator. Fixes issue #737.

Added ppm as default group_fraction.  Added default label string for ppm.

Added Norwegian translations. Thanks to user Aslak! PR #742.

Fixed problem that caused wee_database --check-strings/--fix-strings to fail on
TEXT fields. Fixes issue #738.