Add -Dsvg=disabled to your meson setup/configure command to disable svg
buttons even if the correct version of librsvg is available.
Note that regardless of this patch and the value of the 'svg' variable,
the build will gracefully fall back to not using librsvg if the correct
version is not available.
Helped-by: @01micko
- adds labwc.pot and po files for de, es, it and sv
- added notes in NEWS.md and CONTRIBUTING.md
- addresses #269
- conditional upon `msgfmt` being installed
- can be disabled at build time