Strips leading and trailing spaces from user search to prevent errors when doing webfinger lookup.
Prior to this, webfinger user queries included everything after the second '@' as part of the hostname. This resulted in failed webfinger requests when there was one or more trailing spaces.
Fixes#2205
This should be quicker, because it queries the users in one go instead
of jumping straight to iterating over them, and it checks if a user
blocks the poster before allowing them to be tagged.
Adds a missing rel="nofollow noopener noreferrer" attribute for the
Patreon link, and makes the github link open in a new tab (and updates
the url, which was out of date)
It seems totally reasonable that using an escape slash would make
apostrophes in words work, but the translation system works in
mysterious ways that do not include supporting that. I've used backticks
as a third quote type to escape everything in a way that both
javascript and gettext understand.
While I was there I split up some strings that have more complicated
html in them, since that can be fragile when passed through translation,
and confusing for translators.
Fixes bug on larger screens.
We need to use a function to set the anchor for tour steps when using menus and other elements that become visible or hidden responsively. Because the element is still in the DOM, we can't just rely on it disappearing completely, we have to assign a different (visible) element otherwise the step will simply disappear and the user cannot continue the tour. Previously this used a simple selector which didn't work due to the above.
