Various changes for note feedback

[keesiemeijer]

I found some small bugs and improvements now that the edit feedback feature is implemented in the wporg-developer theme.

1 - There is a potential of quicktags beeing added to the wrong element. The feedback section has an ID of feedback-{$comment_id} and the textarea of the feedback editor has an ID of feedback-{$instance}. As both of these variables are numbers there is a potential of duplicate IDs. This only affects comments with a very low IDs.

2 - When editing a note (in the front end) the link back to the note (in the breadcrumb trail) allways shows note 0.

3 - Javascript improvements. Only search the DOM for comments once.

[coffee2code]

In 7760:

developer.wordpress.org: Fix swapped arguments between sprintf() and __().

Props keesiemeijer.
See #3882.

[coffee2code]

In 7761:

developer.wordpress.org: Change HTML ID for editor to avoid potential ID conflict.

Props keesiemeijer.
See #3882.

[coffee2code]

In 7762:

developer.wordpress.org: Improve JS by only searching for comments once.

Props keesiemeijer.
Fixes #3882.