* added advanced settings dialog that lets the user choose the proxy used for
  add-on compatibility checks on start-up if FoxyProxy is in pattern mode
* allow selection of proxy type during proxy subscription import
* removed unnecessary help button on main dialog explaining the donation,
  FoxyProxy Plus and our proxy services
* added button to promote FoxyProxy for Chrome
* fixed bug in pattern import (an imported rule was never disabled), see:
  http://forums.getfoxyproxy.org/viewtopic.php?f=4&t=767
* fixed wrong pattern type of patterns excluding internal IP addresses, see:
  (http://forums.getfoxyproxy.org/viewtopic.php?f=4&t=777&p=1941)
* fixed rendering issue in the logging tree after deleting all entries
* code clean-up
* updated locales
