Clean up _getFileExtension() method and fix all its callers
fixed unnecessary escaping
+fixes
getLastIndexOf > lastIndexOf
- unnecessary var decl
update web platform docs to include CSS region properties
czech language - sprint 30

updated
Show one name as link if there's a github page.
New line for extension date.
Added isRelativePath public method.
Tweaked codemirror find-match look and feel.
Removed private methods and added documentation to the method.
Dialog list tweak.
Switched by to discs but made them muted.
Reverted test case file.
Merge branch 'master' into jeff/pr4846
Final changes to code review needed to get this into sprint 31
detect pending text insertion that's not reflected in hint list
Tweaked content of inline CSS editor related column.
Tweaked content of inline CSS editor related column.