Plugin: Search for the first conflict in the opened views

Using sublime.set_timeout_async the plugin will now highlight the first
conflict in the file when opening a view via "Show Conflict Files".

A cursur focus doesn't work atm.
Plugin: Ensure cursor is set when opening a conflict file

 - Directly search for the first conflict in the opened view
 - Ensure the cursor is set in the new view by using sublime.set_timeout
   (Github: Sublime issue #39)