Allow skip prototype keyword during search

[NiedziolkaMichal]

Sometimes it's annoying, that the correct search result is not shown, just because the method or property that I am looking for, has the prototype keyword inside. For example, when I want to find get method from Map object, I will write: Map. to see all fields from Map and then start writing .g to see all fields starting with a g letter. At this point, all I can see are 4 search items, unrelated to my request.
I think it would be better, if the keyword prototype would be treated specially, allowing it to be omitted in such search requests.

[caugner]

I agree that this is annoying. A workaround is to search for Map get with a space instead of a dot.

A simple solution would be to preprocess the search query by replacing . with . (or splitting at whitespace and before a dot), which would cause Map and .get to be treated as different query terms.

[caugner]

@NiedziolkaMichal Feel free to review my PR that should fix this.