- Upgraded to codemirror 3.14
-- still using the deprecated simple-hint.js/css method for autocomplete. Need to move to show-hint.js/css which is the updated and currently supported one that also supports having complex suggestion items (text, displayText, css class or even a fully custom rendering function).
-- factored out the xwiki related codemirror modes that were manually packaged inside the custom codemirror distribution and moved them to the SyntaxHighlightingModes page as JSX
-- for future codemirror upgrades, we can now just drop the default codemirror distribution instead of repackaging it
-- added common macros to be used for retrieving codemirror resources
- Added a few new addons: edit/continuecomment.js, edit/closebrackets.js and edit/trailingspace.js
- Customized the TAB key to add whitespaces instead of tabs