Add Translation Context for "Open" String For Topics/Forums

[daveshine]

The "Open" string is used for type of forum but also for opening forums or topics. In English language it's the same word for both but not in other languages, for example in German.

If you add _x( and context string this would solve it.

Affecting
(1) bbp-admin/bbp-topics.php around line 831, I'll suggest to change to:

_x( 'Open', 'Translators: To open topic',  'bbpress' )

(2) bbp-includes/bbp-forum-templates.php around line 2130, I'll suggest to change to:

_x( 'Open', 'Translators: Status of Forum',   'bbpress' )

(3) bbp-includes/bbp-topic-templates.php around line 2332, I'll suggest to change to:

_x( 'Open', 'Translators: Status of Topic',  'bbpress' )

For example in German (1) has to be translated as "Öffnen" but (2) + (3) have to be translated as "Offen".

May seem as a minor thing for some but to not confuse forum admins it's really important to improve the gettext strings here!

[johnjamesjacoby]

Something tells me there are many other places we could do a better job of explaining the context of our strings.

[johnjamesjacoby]

(In [3823]) Add context to 'Open' and 'Close' strings. Props daveshine. Fixes #1798.

[johnjamesjacoby]

(In [3824]) Use esc_attr__ where appropriate. See #1798.