Notification of string changes

Author: Damyon Wiese
MDL-44126 Atto: List of minor fixes from review.
toolbar order (base it on tinymce)
change plain to paragraph
default for collapse plugin should be 5 groups
fix alignment of table dialogue form
insert newlines in html generated by table plugin
rename accessibility helper to screenreader helper
remove accessibility hint for images and media files
fix some broken plugin names
style table captions
remove verbose accessibility hints


http://git.moodle.org/gw?p=moodle.git;a=commit;h=8095505e3cd4b69d9395354d1d5f3f6b345ef5f7
http://github.com/moodle/moodle/commit/8095505e3cd4b69d9395354d1d5f3f6b345ef5f7

+ 2.7 en [pluginname,atto_accessibilityhelper]
+ 2.7 en [presentation,atto_image]
+ 2.7 en [presentationoraltrequired,atto_image]
- 2.7 en [accessibilityhint,atto_image]
- 2.7 en [accessibilityhint,atto_link]
- 2.7 en [accessibilityhint,atto_media]
+ 2.7 en [p,atto_title]