Dart Editor template includes non-standard innerText

[DartBot]

This issue was originally filed by pimmhog...@gmail.com

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To reproduce the problem:

1. Create a new project in Dart Editor.
2. Compile the project.
3. Open the compiled project in Firefox.

I'd expect it to work. It doesn't.

The new project-template includes this line:
p.innerText = message;

innerText is non-stardard, and doesn't work in Firefox. The line could be replaced by:
p.textContent = message;

Note that textContent doesn't work in IE8 and lower.

[stevemessick]

Added Area-Editor, Triaged labels.

[stevemessick]

I'll handle this one.

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Set owner to @stevemessick.
Added Accepted label.

[stevemessick]

Added Fixed label.