3.4.7

   * Fix undroppability of links and some objects to tabs. (regression on recent versions)
   * Add a link to open the options page itself in a new tab, at the top of the page.
   * Add "Reset All" button to the bottom of the options page.
   * Update `de` locale by SammysHP. Thanks!
   * Update `ru` locale by wvxwxvw. Thanks!