fixed missing polyfill buttons, adjusted layout of number input in component editor
UX-381
Merge pull request #2561 from edx/frances/studio/bug-editor-number-layout

Fixed missing polyfill buttons and adjusted layout of number input 
UX-381
first commit to the branch

Added fix to horizontal extension in the TinyMCE RichText-Annotator.

Also includes trying to add annotator to Studio. Only thing failing
currently is getting TinyMCE to work at all.

Adding fixed to merging conflicts

Added folksonomic tags for annotations and also added the ability for video annotation to work on studio minus tinymce