Closes #4105

In some cases, on wrapping points, they span the whole line

Issue #4097

Chrome would show the IME widget too high because it noticed the textarea
was cut off by the wrapping DIV.

Issue #4095

In Replace mode (or Overwrite mode) it should still go backwards
without deleting characters.

- Images now come with tons of information to style them. This mainly
  enables to style alt-texts and potentially make them look like links.
  While still differentialting between links and images.

Closes #4082

Closes #4090

Closes #4087

Closes #4080

and remove autocomplete bindings

Closes #4085

See https://discuss.codemirror.net/t/range-error-with-scrollpastend-addon/773

Issue #4069

Issue #4078

It is, per https://golang.org/ref/spec#Predeclared_identifiers

Closes #4064.

Closes #3888
Closes #4063.

Issue #4038

Issue #4050

Closes #4056

Store the modifier in the original mouse event to choose between
move and copy drags.

Issue #2556

So that they don't interfere with clicking and dragging

Issue #2556

Issue #4057

Closes #4057

Use findMarks instead of findMarksAt in foldGutter.js to correctly
find marks when a single line is collapsed so that the arrow displays
correctly as collapsed.

Add option 'clearOnEnter' to foldcode.js and default it to true.
This option determines whether the marker added when folding a
line clears when the cursor enters it.

Closes #4042