Fix formatting and minor grammar for documentation of composer base class.
Fix jsdoc formatting and small grammar items, as well as add example and explication for KeyComposer
Formatting fixes and additions for PressComposer jsdoc.
JSdoc additions and formatting fixes for TranslateComposer.
JSdoc for SwipeComposer: remove empty doc blocks and add documentation for two user-customizable properties.
Fixes for composer jsdoc code review.
Merge pull request #1356

JSDocs for Composers