Partial fix for UTF-8 usernames
Better input checking and help messages

   - Fix update buttons
   - Don't filter parameter names starting with "nofilter_"
   - Re-allow configadvanced, news URL, and unsigned update URL if routerconsole.advanced=true
   - Re-allow plugin install if routerconsole.advanced=true or routerconsole.enablePluginInstall=true
   - Only allow whitelisted plugin signers, unless routerconsole.allowUntrustedPlugins=true
   - Re-allow clients.config changes if routerconsole.advanced=true or routerconsole.enableClientChange=true
   - More escaping
 * i2psnark: Fix add torrent form

    - Add remove method
    - Add console password form to configui.jsp
    - Consolidate multiple setSettings()/getJettyString() in FormHandler
    - Some form message tweaks

This is required in order to get the theme config keys of the various apps into
themes.config; this way, the routerconsole requires no knowledge of what apps
support universal theming, and can just blanket apply themes to all known keys.

      to eliminate races with ReadConfigJob

    - Split up config network page
    - CSS tweaks and cleanups
    - Change some form notices to errors
    - Spiff up the buttons

    new silk icons: See licenses/LICENSE-SilkIcons.txt
    new toopie icon: Shrunk from existing one

      - Don't save config when checking for updates on configupdate.jsp
      - Rework ConfigRestartBean and tag
      - More tag fixups
      - Add lang=xx for testing
      - Add file for additional tagged strings

    * orange flash remove take 2