0.2-RC2: Fix MathJax-Rendering Issue (and more).

Fixes:
- Many MathJax-Formulas should never be interchanged anymore
  (The bug was introduced with multiple math-output containers having same id)
- AJAX-Forth & Back Navigation works also on tag-filters now
- Slightly improved usability in selected Tag-Buttons (filter-info-view)
- MathJax-Formulas are not directly editable anymore (just via the fx-dialog)
  (This does not apply to math-formulas edited until now)
- MathJax-Formulas have now a fixed title-Attribute set

Features:
- Introduced a "reset filter"-Button into the tag-filter dialog

Pending:
- current layout currently does explicitly not support IE9, IE10 and Opera
- move more edit-related functions into a more private scope
- commit changes from here also into the ck-mathjax repository

Note:
Installation depends on DeepaMehta 4.1.1-SNAPSHOT as of commit:
ca61964a27e6757848e638c3bafc9374c6aff45c

Documentation:
https://www.eduzen.tu-berlin.de/software-komponenten (German)
https://www.eduzen.tu-berlin.de/zur-notizen-webanwendung (German / Get User Account)