Do not highlight "language" in queries

[vmarkovtsev]

We are using CodeMirror, MySQL mode.

It includes "language" in the list of keywords so it is highlighted in the editor. This is very annoying: we have the same function to find the language of a blob.
MySQL indeed lists "language" in the official list of keywords.

I suggest to hack as always:

delete CodeMirror.mimeModes["text/x-mysql"].keywords.language;

Tested - works. I can do a PR if needed.

[carlosms]

If we are going to modify the keywords, I think it would be more useful to include all the gitbase functions.

Closing in favor of #319.