Issue #3023

They aren't faster, and don't work on pseudo-arrays.

Issue #3019

Issue #3009

Issue #3009

To work around a layout quirk in Firefox

Issue #3009

Code that overrides this will break the new scroll model.

Issue #2984

- line.handle.gutterClass is successfully
- Gutter class is removed from Markup

Amending removeLineClass to remove gutter class from markup.

Issue #2997

Also cause widgets with addWidget to have their events ignored.

See http://discuss.codemirror.net/t/click-to-clear-marker-created-with-cm-addwidget/98

Closes #2658

To prevent race conditions where an API call triggers a
resetInput before the new input has been read.

Closes #2975

Closes #2974

Closes #2968

Closes #2955

Implements a pluggable scrollbar model. Interface not documented yet,
but quite simple (see forthcoming simplescrollbars addon)

And manually compensate for our own scrollbar sizes.

This way, we're no longer dependent on the size of our scrollbars
being the same as the size of native scrollbars, and can start to
think about custom scrollbars.

Webkit can't deal with them.

Issue #2945

Issue #2915

Add tests