Docs: review tags page
Use something other then 'stuff'
Revise the goals page
Docs: minor updates to extension actions
Avoid extra whitespace when clicking on suggestions

We get the text from $(".suggestion-translation").text() but jQuery will
not strip the line breaks and indentation, so avoid them.
RTL: Fix select2

https://github.com/ivaynberg/select2/pull/1877
RTL: Fix Magnific-Popup close button

https://github.com/dimsemenov/Magnific-Popup/pull/261
Use subprocess.Popen() instead of os.system()

https://bugzilla.mozilla.org/show_bug.cgi?id=913455
Set X-Frame-Options header to all responses

https://bugzilla.mozilla.org/show_bug.cgi?id=922043
Use is_safe_url() instead of home-grown check

https://bugzilla.mozilla.org/show_bug.cgi?id=922539
Use gravatar over HTTPS

https://bugzilla.mozilla.org/show_bug.cgi?id=922078
Don’t hard-code http in Wikipedia URL
Docs: Fix various issues with gaols page

Fix issues identified in the review of
https://github.com/translate/pootle/commit/133de338580
Tagging: properly delete tag slug in project overview

We need to remove the slug from the visible and the hidden tag list,
else it will show up again when the table is sorted.
Tagging: use AJAX to populate tags filter widget

This way the list of tags is always kept up to date as tags get added or
removed.
Tagging: fixup table filtering

This is a follow up of ff0127c6292cbe847699c0b9baae30f64444bdab, making
it more robust. Now selecting several tags, then removing them one by
one will re-filter the table each time, previously it was broken.
Tagging: Fix adding/removing tags when filtering is used

The tags would disappear/reappear when resetting the filtering, because
we were not updating the master table.