Issue #4726

Closes #4725

To avoid false negatives due to window scrolling

Avoid duplicates for #4719

I broke this in 0ad53e0a. Closes #4713.

The URL for the official blog has changed
Also, there has been a terminology change in the Blogger interface, now 'template' has been replaced by 'theme'

Issue #4712

Issue #4710

Closes #4707

The original character class `[^\\\[\\]]` escapes `\\` instead of `\]`
(e.g. it would be the character class `[^\\\[]` followed by a `]`
which I think is wrong).

Closes #4701

Issue #4622

Dart 1.22 added a new keyword: covariant. http://news.dartlang.org/2017/02/dart-122-faster-tools-assert-messages.html

To work with Chrome's overlay scrollbars

Issue #4676

We use Code Mirror for our code editor at Codevolve.

Issue #4697

Issue #4694