Some labels like one for `translate_emoticons` which contains HTML
get escaped because of use of `{{ label }}` syntax, which escapes
the string for XSS security purpose but since labels aren't any
threat to any such security cases, we can use triple curly brackets
`{{{ label }}}` syntax.
Fixes: #9231.
(It is a preliminary change for deduplication of org settings template.)
This is done because of some settings like organization-settings
has ids which match the pattern of having a prefix `id_`
before the property name.
For those settings which don't have any prefix, there will be no
effect.
Here obsolete `t` in the label is removed since we do
label translations in JS files.