[Feature] `text=` selector to match <input type="submit" value="myinput">

[aesyondu]

Test case: aesyondu@8548b3d

Would it make sense to allow text selector for input element of type submit, in the same way as a button element?

<button>mybutton</button> works, but <input type="submit" value="myinput"> doesn't, even though they have very similar functionality.

I created a test case above, and played around with textSelectorEngine.ts, but couldn't figure out how to make the input test case pass.