Another iteration on pushing the selection forward on no-change reindents
[less mode] Bugfix
[mbo theme] Fix matching tag background highlighting
[less mode] Fix null dereference bug

Issue #1926
[less mode] Fix null dereference bug (part 2)

Issue #1926
[javascript-hint addon] Don't fire hints in comments or strings
[pig mode] Add DUMP as keyword
Add IE11+ detection, use it to fix failing test

Closes #1826
[coffeescript mode] Some refinement in indentation

Issue #1932
[coffeescript mode] Fix bug introduced by 567a94b89cbe8b

Issue #1932
[indent-fold addon] Include empty lines
[indent-fold addon] Consider all-whitespace lines empty lines
[indent-fold addon] Return nothing on edge cases
Clip scroll positions given to scrollTo to scrollable space

Closes #1934
Add more extending unicode ranges
Document execCommand

Issue #1935
[dialog addon] Add cm.openNotification: timed & unobtrusive dialog
[dialog addon] Slight modifications to openNotification

Remove callback argument, save currently open dialog in per-editor state.
[vim mode] use openNotification instead of openConfirm for errors
[markdown mode] `\n* ` should not toggle em state.

Closes #1920.