<Plug>(openbrowser-open) should open selected URL as-is in visual mode

[tyru]

Problem

Currently, <Plug>(openbrowser-open) and <Plug>(openbrowser-smart-search) can't open the below URL (:OpenBrowser can open it though).
This bug was introduced by #72 and #73 fix.
https://ja.wikipedia.org/wiki/%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0_(%E3%82%B3%E3%83%B3%E3%83%94%E3%83%A5%E3%83%BC%E3%82%BF)

Solution

<Plug>(openbrowser-open) and <Plug>(openbrowser-smart-search) should open selected URL as-is in visual-mode.
Allow any string (including any character ', '(', ')', or Unicode character) and just pass the string to a browser.
Currently, the mappings search URLs from given string, and open it.

Here are the expected behaviors for each keymapping, ex-command.

Keymappings(Normal mode)	Keymappings(Visual mode)*1	<Plug>(openbrowser-smart-search)
Loose PatternSet*2	Allow any string	Allow any string*4

Ex-commands*3	:OpenBrowserSmartSearch
Allow any string	Allow any string*4

*1: Excluding <Plug>(openbrowser-smart-search)
*2: Allowed characters in RFC3986 excluding ', (, ) #72
*3: Excluding :OpenBrowserSmartSearch
*4: If selected text starts with {scheme}://, open it as URL. Otherwise, open it as filepath.

[y]

I think this is the same problem I'm having with this perfectly valid url:
http://google.com/search?q=("this"+OR+"that")&tbs=qdr:w&filter=0