hterm 1.37: fix selection collapse.

* s/selection.collapse()/selection.collapseToEnd().  The former now throws an
  exception in Chrome if called with no arguments, which breaks our attempts
  to block local selection when vt mouse is enabled.

Change-Id: I1041f211e3b900714bdc743d998141aad7160090
Reviewed-on: https://chromium-review.googlesource.com/200036
Reviewed-by: Marvelous Marius <mschilder@chromium.org>
Commit-Queue: Marvelous Marius <mschilder@chromium.org>
Tested-by: Robert Ginda <rginda@chromium.org>
nassh 0.8.27.5: Add wash support, update hterm.

* Update to hterm 1.38 for 'ctrl-c-copy' and 'pass-meta-v' prefs and selection
  collapse fixes.
* Add wam/wash support.  Enabled by default in Secure shell (dev).  Toggle
  the wam listener from the js console of the secure shell background page with:

    app_.prefs_.set('enable-wam', true);   // enable
    app_.prefs_.set('enable-wam', false);  // disable

    // Array if chrome extension ids which are allowed to make wam connections
    // to nassh.  Defaults to Wash (tot) and Wash (dev).
    app_.prefs_.set('wam-whitelist', [...]);

Change-Id: Ia3813f4b88dd26381242abd87cc4783a4154392e
Reviewed-on: https://chromium-review.googlesource.com/200085
Reviewed-by: Robert Ginda <rginda@chromium.org>
Commit-Queue: Robert Ginda <rginda@chromium.org>
Tested-by: Robert Ginda <rginda@chromium.org>