Spellcheck for IE inputs

[csuhta]

IE10, IE11, and Edge do not automatically enable spellcheck for input type=text, they only automatically enable it for textarea.

Add a small JavaScript snippet that adds the spellcheck=true attribute to any input type=text that doesn't have an explicit spellcheck attribute set.

cc @lfrancis

[lfrancis]

Fwiw, my original suggestion was limited to just the Tolarian admin interface, to help IE-using clients flag typos before they showed up on a site.

[csuhta]

That's what I mean, this would be just for the admin forms