Eval html toolbutton

[vendelin8]

Q	A
Bug fix?	no
New feature?	yes
BC breaks?	no
Deprecations?	no
New tests added?	yes
Fixed tickets
License	MIT

Description

A new tool button for evaluating inserted html, basically for embedding videos or objects.

Please, don't submit /dist files with your PR!

[coveralls]

Coverage increased (+0.006%) to 94.739% when pulling f0dd84e on vendelin8:eval-html-toolbutton into d2c21a7 on yabwe:master.

[nmielnik]

@vendelin8 would you mind just calling this 'html' instead of 'eval'? Inserting raw html is a pretty common concept for text-editors, so I think it would be pretty intuitive what 'html' would mean.

My guess is that developer would have one set of expectations for what 'eval' means (scary javascript) and regular non-coder users would be perplexed as to what 'eval' could mean...

Also, there are 2 other places to mention your new button:

1. In the README
2. In the extensions README

This is a nice and simple idea, I like it. Sorry for your PR sitting for such a crazy long time, my attempt at recruiting more collaborators failed before I had to get pulled into a bunch of other projects.

[vendelin8]

@nmielnik I don't mind at all, go for it!
Thanks for letting it happen, and for all the good stuff so far! :)

[nmielnik]

Merging this work in #1291 to be completed there. Thanks again @vendelin8