Update modelist.html
Update settings_menu.html

insert ext-settings_menu.js
Merge pull request #1408 from SourceR85/master

Fix errors in demo-files
fix missing var in modelist
more sites using ace
fix #1407 Emmet breaks blockindent
display emmet shortcuts in keybindings menu
allow canceling commands in multi_select mode
markClean and isClean added into UndoManager
indentation fixed
Merge pull request #1410 from Joonsoo/master

Dirty check functionality added into UndoManager
Merge pull request #1411 from ajaxorg/emmet

Emmet bugfix
add support for meta key modifier on windows
dirty counter bug fixed
do not call unshift in getTextRange
code style
try to not remove spaces from indentation when uncommenting
fix tests
insert/removeLines at the document edges create deltas with wrong range
fix python string highlighting