Update wiki.less: fix showfor padding

I added 10px padding (right and left) for .selectbox class, to make the texts displayed in the Select input boxes for OS and Mozilla Version in KB articles.

Example

Open the below link you can find 2 select box right to the firefox logo above editing tools option.
https://support.mozilla.org/en-US/kb/firefox-takes-long-time-start-up
[Bug 906992] Set up multiple ES index framework.

Now settings.py can contain multiple indexes in ES_INDEXES and/or
ES_WRITE_INDEXES, and models can choose which kind of index to use. The
admin and management commands have been updated, and I updated search
and other parts of the site that use elastic to account for multiple
indexes, where needed.
[bug 884775] Fix the support forum validation
[bug 916754] Change wording for chosen solution.
[bug 926917] Add Firefox 26, hide Firefox 22.
Firefox 24 now the default.
[bug 902108] Add dennis v0.3.7 to vendor/

This updates polib and adds dennis to vendor/. Now we can do things
like:

    ./manage.py lint
    ./manage.py translate

Also, this nixes poxx.py and localelinter.py which aren't needed
anymore.
[bug 902108] Add compile-linted-mo.sh script
[bug 902108] Fix deploy script to run compile-linted-mo.sh
Fix path to compile-linted-mo.sh in deploy script
Back out the compile-linted-mo.sh change

The update_locales step went from like 6 seconds to 528 seconds. That's
too slow. I'm backing it out for now to look into it.
[Bug 926930] Use nosenicedots for Travis tests.
Make test setup and install quieter.
Convert wiki app to south.
[bug 635625] Migrate all 'nb-NO' locale data to 'no' locale.
Tweak .less.css removal to be shell-generic
Use dennis_shim.py for 10x speedup

Turns out running dennis in ./manage.py is uber-slow because of all the
django/whatever stuff. Running dennis directly with a shim that sets up
the sys.path correctly is *so much faster*.

Also, this updates dennis to v0.3.8 which picks up a fix for false
positives in mismatched variables error detection.
Use compile-linted-mo.sh in deploy
Add docs for reporting errors in .po files
[bug 926611] Fix y axis re-scaling on aggregated charts.