libtoxcore: bump, build DHT bootstrap daemon
nixos: tox-bootstrapd service
shotwell: Fix "Using the 'memory' GSettings backend" (fix suggested by lethalman, see issue #5433).
Also install hicolor_icon_theme.
Merge pull request #5434 from mcmtroffaes/feature/shotwell-gsettings-fix

shotwell: use gsettings dconf backend, use hicolor_icon_theme
Merge pull request #5419 from ehmry/tox-bootstrapd

tox-bootstrapd
maxima: update to version 5.35.1
wxmaxima: update to version 14.12.1