Should not strip type="text" from <input> tag due to CSS rules needing it

Yes, I know that type="text" is the default for an tag, so therefore it should be safe to strip it out.

The problem is when there are css rules that assume that this attribute has not been stripped out.

e.g.
```
input[type=text], input[type=email], input[type=submit] {
...
}
```

It just seems safer to not strip that out.

The issue names no source file or test. Start by locating the logic that strips the default input type attribute and any related tests; done means explicit type="text" is preserved so selectors such as input[type=text] continue to match.

Written by the indexing model from the issue text.