Apologies if this has been requested before...

As a non-technical user I want to be able, to change the theme title when extending it.

When extending a theme, you can only give it a name. So when I extend "vanilla" and call it "My Theme" I get:

<xml>
<metadata>
<name>My Theme</name>
<title>Bootstrap Vanilla</title>
</xml>

In the themes overview, the title is then the most prominent part (heading and bold), and it always repeats "Bootstrap Vanilla". This is very confusing. I then can only change he title via ssh and vim. (Maybe there is another way, not sure).

So my suggestion would be:

1. Let the user give it the "title" not the "name".
2. Allow the user to provide also the name - or derive the name form the title (make it lowercase, and alnum)
3. Other options ....

I would be open to provide a PR with these changes.